Pub Date : 2011-05-22DOI: 10.1109/CLEOE.2011.5943485
G. Genty, M. Surakka, J. Turunen, A. Friberg
Supercontinuum (SC) generated in highly nonlinear fibers exhibit unique spectral, temporal and spatial coherence [1] which impacts directly the intended application. It is therefore important to be able to evaluate the coherence properties of SC light in a systematic way. The first attempt to describe the coherence of SC pulses was reported by Dudley and Coen who have introduced the modulus of a normalized second-order coherence function averaged over a finite bandwidth [2]. Here, we reconsider the shot-to-shot fluctuations of SC by using standard two-time and two-frequency correlation functions of second-order coherence theory of non-stationary light. This allows us to (i) explicitly define unambiguous measures of temporal and spectral coherence and (ii) show that SC light can be decomposed into a sum of quasi-coherent and quasi-stationary contributions.
{"title":"Complete characterization of supercontinuum coherence properties","authors":"G. Genty, M. Surakka, J. Turunen, A. Friberg","doi":"10.1109/CLEOE.2011.5943485","DOIUrl":"https://doi.org/10.1109/CLEOE.2011.5943485","url":null,"abstract":"Supercontinuum (SC) generated in highly nonlinear fibers exhibit unique spectral, temporal and spatial coherence [1] which impacts directly the intended application. It is therefore important to be able to evaluate the coherence properties of SC light in a systematic way. The first attempt to describe the coherence of SC pulses was reported by Dudley and Coen who have introduced the modulus of a normalized second-order coherence function averaged over a finite bandwidth [2]. Here, we reconsider the shot-to-shot fluctuations of SC by using standard two-time and two-frequency correlation functions of second-order coherence theory of non-stationary light. This allows us to (i) explicitly define unambiguous measures of temporal and spectral coherence and (ii) show that SC light can be decomposed into a sum of quasi-coherent and quasi-stationary contributions.","PeriodicalId":6331,"journal":{"name":"2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference (CLEO EUROPE/EQEC)","volume":"24 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2011-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80681961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-05-22DOI: 10.1109/CLEOE.2011.5942794
P. Mehta, N. Healy, J. Sparks, T. Day, P. Sazio, J. Badding, A. Peacock
Silicon optical fibres are generating much interest as a means to directly integrate semiconductor functionality within the fibre architecture to provide a platform for compact all optical signal processing. For example, the high optical nonlinearity of the core material opens up the potential for these fibres to be used for signal regeneration in very short device lengths. In this paper we characterise the nonlinear optical properties of a step index hydrogenated amorphous silicon (a-Si:H) optical fibre and demonstrate its use for broadband self-phase modulation (SPM). The fibre was fabricated using a high pressure chemical fluid technique [1] to deposit the semiconductor into the central hole of a silica capillary. The resulting fibre had a core diameter of 6µm and a length of 1.5cm, with the linear transmission losses measured to be as low as 1.7dB/cm at 1550nm. As the effective nonlinear interaction length is reduced by the material loss, the realization of low losses is a necessary requirement for the observation of these processes.
{"title":"Nonlinear absorption and self-phase modulation in silicon optical fibres","authors":"P. Mehta, N. Healy, J. Sparks, T. Day, P. Sazio, J. Badding, A. Peacock","doi":"10.1109/CLEOE.2011.5942794","DOIUrl":"https://doi.org/10.1109/CLEOE.2011.5942794","url":null,"abstract":"Silicon optical fibres are generating much interest as a means to directly integrate semiconductor functionality within the fibre architecture to provide a platform for compact all optical signal processing. For example, the high optical nonlinearity of the core material opens up the potential for these fibres to be used for signal regeneration in very short device lengths. In this paper we characterise the nonlinear optical properties of a step index hydrogenated amorphous silicon (a-Si:H) optical fibre and demonstrate its use for broadband self-phase modulation (SPM). The fibre was fabricated using a high pressure chemical fluid technique [1] to deposit the semiconductor into the central hole of a silica capillary. The resulting fibre had a core diameter of 6µm and a length of 1.5cm, with the linear transmission losses measured to be as low as 1.7dB/cm at 1550nm. As the effective nonlinear interaction length is reduced by the material loss, the realization of low losses is a necessary requirement for the observation of these processes.","PeriodicalId":6331,"journal":{"name":"2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference (CLEO EUROPE/EQEC)","volume":"8 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2011-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79602669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-05-22DOI: 10.1109/CLEOE.2011.5943411
C. Wolpert, L. Wang, P. Atkinson, A. Rastelli, O. Schmidt, M. Lippitz
Semiconductor quantum dots (QDs) are a promising candidate for the realization of qubits for quantum computation [1]. With coherence times of below 1 ns, writing, manipulation and read-out of a qubit requires ultrafast laser pulses interacting coherently with the system [2]. A key experiment in this context is the observation of Rabi oscillations, where the population of a two-level system can be driven coherently back and forth between the ground state and the excited state. The GaAs/AlGaAs material system is favourable for spectroscopy, because the emission energy of the exciton of around 1.7 eV falls into a region where Si-detectors have still a high quantum efficiency. As the GaAs substrate is absorbing at the exciton transition energy, we have to employ a shot-noise limited pump-probe technique operating in reflection geometry. We accomplished to observe Rabi oscillations in one of the fine-structure split ground state excitonic states of our GaAs QDs, monitoring its population by the bleaching it imposes on the second ground state exciton transition (see Fig.1 left). The first period of these population oscillations yields a dipole moment of about 15 D for the s-shell exciton. A second period is still visible, but stretched and shifted to higher pulse areas (see Fig.1). This behavior can be explained by a phenomenological model that takes into account the interaction with hot, delocalized carriers which are excited by the pump pulse in the GaAs substrate.
{"title":"Coherent spectroscopy of single semiconductor quantum dots","authors":"C. Wolpert, L. Wang, P. Atkinson, A. Rastelli, O. Schmidt, M. Lippitz","doi":"10.1109/CLEOE.2011.5943411","DOIUrl":"https://doi.org/10.1109/CLEOE.2011.5943411","url":null,"abstract":"Semiconductor quantum dots (QDs) are a promising candidate for the realization of qubits for quantum computation [1]. With coherence times of below 1 ns, writing, manipulation and read-out of a qubit requires ultrafast laser pulses interacting coherently with the system [2]. A key experiment in this context is the observation of Rabi oscillations, where the population of a two-level system can be driven coherently back and forth between the ground state and the excited state. The GaAs/AlGaAs material system is favourable for spectroscopy, because the emission energy of the exciton of around 1.7 eV falls into a region where Si-detectors have still a high quantum efficiency. As the GaAs substrate is absorbing at the exciton transition energy, we have to employ a shot-noise limited pump-probe technique operating in reflection geometry. We accomplished to observe Rabi oscillations in one of the fine-structure split ground state excitonic states of our GaAs QDs, monitoring its population by the bleaching it imposes on the second ground state exciton transition (see Fig.1 left). The first period of these population oscillations yields a dipole moment of about 15 D for the s-shell exciton. A second period is still visible, but stretched and shifted to higher pulse areas (see Fig.1). This behavior can be explained by a phenomenological model that takes into account the interaction with hot, delocalized carriers which are excited by the pump pulse in the GaAs substrate.","PeriodicalId":6331,"journal":{"name":"2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference (CLEO EUROPE/EQEC)","volume":"34 3 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2011-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79623541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-05-22DOI: 10.1109/CLEOE.2011.5942441
T. Omatsu, K. Iwamatsu, S. Chard, A. Minassian, M. Damzen
Pulsed radially-polarized beams have been subject of recent attention in fields such as highly efficient laser ablation, super-resolution microscopy, and plasma guiding.
脉冲径向偏振光束近年来在高效激光烧蚀、超分辨率显微术和等离子体引导等领域受到广泛关注。
{"title":"Radially-polarized, Q-switched pulses from a side-pumped Nd:YVO4 compact stigmatic bounce laser with a photonic crystal output coupler","authors":"T. Omatsu, K. Iwamatsu, S. Chard, A. Minassian, M. Damzen","doi":"10.1109/CLEOE.2011.5942441","DOIUrl":"https://doi.org/10.1109/CLEOE.2011.5942441","url":null,"abstract":"Pulsed radially-polarized beams have been subject of recent attention in fields such as highly efficient laser ablation, super-resolution microscopy, and plasma guiding.","PeriodicalId":6331,"journal":{"name":"2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference (CLEO EUROPE/EQEC)","volume":"12 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2011-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79643478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-05-22DOI: 10.1109/CLEOE.2011.5942505
K. Beil, S. T. Fredrich-Thornton, C. Krãnkel, K. Petermann, D. Parisi, M. Tonelli, G. Huber
The thin disk laser is a well-established setup for lasers with high output powers in continuous wave as well as in pulsed operation mode [1]. The most common gain material for the thin disk laser is Yb:YAG. In order to obtain even higher output powers an increased thermal conductivity is beneficial. One solution to obtain higher thermal conductivities of the gain material is to substitute the Y-ion with the Lu-ion. We have shown that in such gain materials like Yb:LuAG [2] or Yb:Lu2O3 [3], the thermal conductivity remains high even for high Yb-doping concentrations. Another solution to improve the heat removal is to reduce the thickness of the gain material. To maintain a good absorption in this case, high doping concentrations are necessary. However, it has been shown that efficient laser operation cannot be achieved in Yb:YAG for more than 15% Yb-doping concentration. Also in terms of the achievable pulse duration in modelocked operation, Yb:YAG is not the best choice due to its limited gain bandwidth. For this purpose mixed gain materials like Yb:LuScO3 have been shown to be very suitable [4].
{"title":"New thin disk laser materials: Yb:ScYLO and Yb:YLF","authors":"K. Beil, S. T. Fredrich-Thornton, C. Krãnkel, K. Petermann, D. Parisi, M. Tonelli, G. Huber","doi":"10.1109/CLEOE.2011.5942505","DOIUrl":"https://doi.org/10.1109/CLEOE.2011.5942505","url":null,"abstract":"The thin disk laser is a well-established setup for lasers with high output powers in continuous wave as well as in pulsed operation mode [1]. The most common gain material for the thin disk laser is Yb:YAG. In order to obtain even higher output powers an increased thermal conductivity is beneficial. One solution to obtain higher thermal conductivities of the gain material is to substitute the Y-ion with the Lu-ion. We have shown that in such gain materials like Yb:LuAG [2] or Yb:Lu2O3 [3], the thermal conductivity remains high even for high Yb-doping concentrations. Another solution to improve the heat removal is to reduce the thickness of the gain material. To maintain a good absorption in this case, high doping concentrations are necessary. However, it has been shown that efficient laser operation cannot be achieved in Yb:YAG for more than 15% Yb-doping concentration. Also in terms of the achievable pulse duration in modelocked operation, Yb:YAG is not the best choice due to its limited gain bandwidth. For this purpose mixed gain materials like Yb:LuScO3 have been shown to be very suitable [4].","PeriodicalId":6331,"journal":{"name":"2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference (CLEO EUROPE/EQEC)","volume":"193 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2011-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79732427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-05-22DOI: 10.1109/CLEOE.2011.5942573
T. Schwarzback, H. Kahle, M. Eichfelder, W. Schulz, R. Rossbach, M. Jetter, P. Michler
In recent years, vertical external cavity surface-emitting lasers (VECSELs) became an important category of power-scalable semiconductor lasers in a wide range of applications. Examples can be found in many fields of work as biophotonics, television or projectors, spectroscopy or lithography. Using external cavities and optical excitation, VECSELs exhibit high continuous-wave (cw) output power and near-diffraction-limited beam quality with a TEM00 Gaussian beam profile [1]. With an external cavity, the possibility of utilizing intra-cavity optical elements arise. Here, filters and frequency conversion crystals could be used intra-cavity to expand the spectral range of the laser by wavelength tuning or harmonic generation of coherent laser light.
{"title":"Generation of UV laser light via intra-cavity frequency doubling of an AlGaInP-VECSEL","authors":"T. Schwarzback, H. Kahle, M. Eichfelder, W. Schulz, R. Rossbach, M. Jetter, P. Michler","doi":"10.1109/CLEOE.2011.5942573","DOIUrl":"https://doi.org/10.1109/CLEOE.2011.5942573","url":null,"abstract":"In recent years, vertical external cavity surface-emitting lasers (VECSELs) became an important category of power-scalable semiconductor lasers in a wide range of applications. Examples can be found in many fields of work as biophotonics, television or projectors, spectroscopy or lithography. Using external cavities and optical excitation, VECSELs exhibit high continuous-wave (cw) output power and near-diffraction-limited beam quality with a TEM00 Gaussian beam profile [1]. With an external cavity, the possibility of utilizing intra-cavity optical elements arise. Here, filters and frequency conversion crystals could be used intra-cavity to expand the spectral range of the laser by wavelength tuning or harmonic generation of coherent laser light.","PeriodicalId":6331,"journal":{"name":"2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference (CLEO EUROPE/EQEC)","volume":"69 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2011-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83325768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-05-22DOI: 10.1109/CLEOE.2011.5942437
M. Fechner, F. Reichert, P. Koopmann, K. Petermann, G. Huber
Recent progress in the development of GaInN laser diodes in the blue region enables solid-state lasers in the visible spectral range without frequency conversion. This was demonstrated to be a highly efficient process in for example praseodymium doped materials [1]. But also the trivalent holmium ion provides absorption lines in the blue spectral region and emission lines around 550 nm. However, so far laser action on this transition has only been realized at low temperatures [2,3]. Since the energy gap between the thermally coupled 5S2 and 5F4 manifolds - the initial states of the green emission - and the adjacent 5F5 level is only about 2700 cm−1, low phonon hosts as for example Lu2O3 (Eeff,phon = 550 cm−1) are required to minimize non-radiative losses. We report a fundamental spectroscopic research of Ho:Lu2O3 in order to evaluate the laser potential of the green transition. Crystals were grown by the Heat-Exchanger and Nacken-Kyropoulos method and the spectroscopic investigations include temperature dependent lifetime measurements as well as the determination of the ground state absorption, the excited state absorption, and the emission cross sections.
{"title":"Spectroscopy of Ho:Lu2O3 with respect to the realization of a visible laser","authors":"M. Fechner, F. Reichert, P. Koopmann, K. Petermann, G. Huber","doi":"10.1109/CLEOE.2011.5942437","DOIUrl":"https://doi.org/10.1109/CLEOE.2011.5942437","url":null,"abstract":"Recent progress in the development of GaInN laser diodes in the blue region enables solid-state lasers in the visible spectral range without frequency conversion. This was demonstrated to be a highly efficient process in for example praseodymium doped materials [1]. But also the trivalent holmium ion provides absorption lines in the blue spectral region and emission lines around 550 nm. However, so far laser action on this transition has only been realized at low temperatures [2,3]. Since the energy gap between the thermally coupled <sup>5</sup>S<inf>2</inf> and <sup>5</sup>F<inf>4</inf> manifolds - the initial states of the green emission - and the adjacent <sup>5</sup>F<inf>5</inf> level is only about 2700 cm<sup>−1</sup>, low phonon hosts as for example Lu<inf>2</inf>O<inf>3</inf> (E<inf>eff,phon</inf> = 550 cm<sup>−1</sup>) are required to minimize non-radiative losses. We report a fundamental spectroscopic research of Ho:Lu<inf>2</inf>O<inf>3</inf> in order to evaluate the laser potential of the green transition. Crystals were grown by the Heat-Exchanger and Nacken-Kyropoulos method and the spectroscopic investigations include temperature dependent lifetime measurements as well as the determination of the ground state absorption, the excited state absorption, and the emission cross sections.","PeriodicalId":6331,"journal":{"name":"2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference (CLEO EUROPE/EQEC)","volume":"88 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2011-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83539243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-05-22DOI: 10.1109/CLEOE.2011.5943198
E. Coscelli, F. Poli, D. Passaro, A. Cucinotta, S. Selleri, T. Alkeskjold, L. Leick, J. Broeng
Yb-doped Double Cladding Photonic Crystal Fibers (DC-PCFs) with low numerical aperture have been successfully exploited to realize high-power lasers and amplifiers. Recently, in order to obtain the high effective area values required to avoid detrimental nonlinear effects, PCFs with core obtained by removing 19 cells from the cladding lattice have been proposed. A critical issue dealing with fibers with such large core is the possibility to obtain single-mode guiding, which is a mandatory requirement for most high-power applications. So far, a thorough analysis of the single-mode regime of this kind of fibers has not been presented. The cut-off properties of PCFs with 1-cell or 7-cell core have been studied extensively in literature, for example in [1], by considering the effective index of the Fundamental Space-filling Mode (FSM) as the refractive index of the fiber cladding. As a consequence, cut-off condition has been set where the effective index of the guided mode equals the one of the FSM. It has been shown that the hypothesis of an infinite cladding, which is assumed in this approach, no longer holds when 19-cell core DC PCFs are considered [2].
{"title":"Single-Mode regime of large mode area double cladding photonic crystal fibers","authors":"E. Coscelli, F. Poli, D. Passaro, A. Cucinotta, S. Selleri, T. Alkeskjold, L. Leick, J. Broeng","doi":"10.1109/CLEOE.2011.5943198","DOIUrl":"https://doi.org/10.1109/CLEOE.2011.5943198","url":null,"abstract":"Yb-doped Double Cladding Photonic Crystal Fibers (DC-PCFs) with low numerical aperture have been successfully exploited to realize high-power lasers and amplifiers. Recently, in order to obtain the high effective area values required to avoid detrimental nonlinear effects, PCFs with core obtained by removing 19 cells from the cladding lattice have been proposed. A critical issue dealing with fibers with such large core is the possibility to obtain single-mode guiding, which is a mandatory requirement for most high-power applications. So far, a thorough analysis of the single-mode regime of this kind of fibers has not been presented. The cut-off properties of PCFs with 1-cell or 7-cell core have been studied extensively in literature, for example in [1], by considering the effective index of the Fundamental Space-filling Mode (FSM) as the refractive index of the fiber cladding. As a consequence, cut-off condition has been set where the effective index of the guided mode equals the one of the FSM. It has been shown that the hypothesis of an infinite cladding, which is assumed in this approach, no longer holds when 19-cell core DC PCFs are considered [2].","PeriodicalId":6331,"journal":{"name":"2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference (CLEO EUROPE/EQEC)","volume":"8 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2011-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88571067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-05-22DOI: 10.1109/CLEOE.2011.5942564
C. Nshii, C. Ironside, M. Sorel, T. Slight, S.Y. Zhang, D. Revin, J. Cockburn
Quantum cascade lasers (QCLs) are semiconductor lasers based on intersubband transitions in quantum wells [1]. Semiconductor lasers in ring format do not need cleaved facets or gratings to achieve optical feedback required for lasing and could support either bidirectional or unidirectional operation[2].
{"title":"Quantum cascade ring lasers: Unidirectional operation and coupled ring tuning","authors":"C. Nshii, C. Ironside, M. Sorel, T. Slight, S.Y. Zhang, D. Revin, J. Cockburn","doi":"10.1109/CLEOE.2011.5942564","DOIUrl":"https://doi.org/10.1109/CLEOE.2011.5942564","url":null,"abstract":"Quantum cascade lasers (QCLs) are semiconductor lasers based on intersubband transitions in quantum wells [1]. Semiconductor lasers in ring format do not need cleaved facets or gratings to achieve optical feedback required for lasing and could support either bidirectional or unidirectional operation[2].","PeriodicalId":6331,"journal":{"name":"2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference (CLEO EUROPE/EQEC)","volume":"1 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2011-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88741101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-05-22DOI: 10.1109/CLEOE.2011.5942635
K. Schires, A. Hurtado, I. Henning, M. Adams
A semiconductor laser under external optical injection exhibits a wide range of nonlinear dynamics [1] and it is known that injection into multimode lasers leads to complex dynamics between the modes [2]. Here we report on orthogonal optical injection into a 1550 nm vertical-cavity surface-emitting laser (VCSEL) that exhibits two modes corresponding to the orthogonal polarisations of the fundamental transverse mode of the device. We show, for the first time to our knowledge, an analysis of the time series of simultaneously-measured orthogonal polarisations of the fundamental mode.
{"title":"Polarisation-resolved real-time series of the dynamics of a 1550 nm-VCSEL under orthogonal optical injection","authors":"K. Schires, A. Hurtado, I. Henning, M. Adams","doi":"10.1109/CLEOE.2011.5942635","DOIUrl":"https://doi.org/10.1109/CLEOE.2011.5942635","url":null,"abstract":"A semiconductor laser under external optical injection exhibits a wide range of nonlinear dynamics [1] and it is known that injection into multimode lasers leads to complex dynamics between the modes [2]. Here we report on orthogonal optical injection into a 1550 nm vertical-cavity surface-emitting laser (VCSEL) that exhibits two modes corresponding to the orthogonal polarisations of the fundamental transverse mode of the device. We show, for the first time to our knowledge, an analysis of the time series of simultaneously-measured orthogonal polarisations of the fundamental mode.","PeriodicalId":6331,"journal":{"name":"2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference (CLEO EUROPE/EQEC)","volume":"87 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2011-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88758874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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