Pub Date : 2009-11-10DOI: 10.1109/ICIMW.2009.5324651
A. Adam, J. Knab, L. Guestin, E. Shaner, P. Planken
Broadband THZ near-field measurements were performed on different types of antennas and meta materials structures, all having sub-wavelength dimensions. The time and frequency dependence of the electric near-field are presented and compared with numerical calculations.
{"title":"Terahertz near-field measurements of subwavelength antenna structures and metamaterials","authors":"A. Adam, J. Knab, L. Guestin, E. Shaner, P. Planken","doi":"10.1109/ICIMW.2009.5324651","DOIUrl":"https://doi.org/10.1109/ICIMW.2009.5324651","url":null,"abstract":"Broadband THZ near-field measurements were performed on different types of antennas and meta materials structures, all having sub-wavelength dimensions. The time and frequency dependence of the electric near-field are presented and compared with numerical calculations.","PeriodicalId":346720,"journal":{"name":"CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126270707","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 : 2009-11-01DOI: 10.1109/TERAMIR.2009.5379621
M. Soldo, N. Gibbons, G. Giuliani
Wireless communication systems require compact sources for the generation of mm-wave signals, that must have high spectral purity (linewidth ≪ 100 kHz, phase noise ≪ 100 dBc @ 100 kHz offset), tuneability, low power consumption and low cost [1]. Other important applications for mm-wave signals are: i) anti-collision car-borne radars (60 GHz); ii) local oscillators for astronomic investigations (100–900 GHz range); iii) THz applications (300–3000 GHz range) [2].
{"title":"Generation of a narrow linewidth mm-wave signal from two phase-locked DFB lasers that are mutually coupled via four wave mixing","authors":"M. Soldo, N. Gibbons, G. Giuliani","doi":"10.1109/TERAMIR.2009.5379621","DOIUrl":"https://doi.org/10.1109/TERAMIR.2009.5379621","url":null,"abstract":"Wireless communication systems require compact sources for the generation of mm-wave signals, that must have high spectral purity (linewidth ≪ 100 kHz, phase noise ≪ 100 dBc @ 100 kHz offset), tuneability, low power consumption and low cost [1]. Other important applications for mm-wave signals are: i) anti-collision car-borne radars (60 GHz); ii) local oscillators for astronomic investigations (100–900 GHz range); iii) THz applications (300–3000 GHz range) [2].","PeriodicalId":346720,"journal":{"name":"CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129944650","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 : 2009-07-08DOI: 10.1109/URSIGASS.2011.6050674
D. Brissinger, B. Cluzel, A. Coillet, C. Dumas, P. Grelu, F. de Fornel
Micro- and nanocavities allow for strong light confinement in very small volume [1]. They give opportunities for new experiments such as cavity quantum electrodynamics, waveguiding, light slowing or trapping…[2] The increase of the electromagnetic (EM) field in the cavity enhances the interaction between light and matter, resulting in the possible observation of nonlinear effects [3]. Several studies have recently been published on the observation and characterisation of nonlinear silicon cavities [4]. As a step further, we propose and demonstrate the feasibility of an innovative way to mechanically control the bistable operating regime of a nanovavity. Using a near-field tip, we switch the nanocavity operating regime between monostable and bistable behaviours.
{"title":"Near-field control of optical bistability in a nanocavity","authors":"D. Brissinger, B. Cluzel, A. Coillet, C. Dumas, P. Grelu, F. de Fornel","doi":"10.1109/URSIGASS.2011.6050674","DOIUrl":"https://doi.org/10.1109/URSIGASS.2011.6050674","url":null,"abstract":"Micro- and nanocavities allow for strong light confinement in very small volume [1]. They give opportunities for new experiments such as cavity quantum electrodynamics, waveguiding, light slowing or trapping…[2] The increase of the electromagnetic (EM) field in the cavity enhances the interaction between light and matter, resulting in the possible observation of nonlinear effects [3]. Several studies have recently been published on the observation and characterisation of nonlinear silicon cavities [4]. As a step further, we propose and demonstrate the feasibility of an innovative way to mechanically control the bistable operating regime of a nanovavity. Using a near-field tip, we switch the nanocavity operating regime between monostable and bistable behaviours.","PeriodicalId":346720,"journal":{"name":"CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference","volume":"193 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123015578","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 : 2009-06-14DOI: 10.1109/CLEOE-EQEC.2009.5192768
H. Seo, J. Ahn, B. Park
Cladding pumped fibre lasers have been rapidly researched and developed with help of semiconductor laser diode bar and stack [1]. Especially these fiber lasers showed a high power conversion efficiency of about ∼80% in case of Yb-doped double clad fiber laser and a high-quality beam of M2 ≈ 1. Output power of a fiber laser is determined by how much a pump light can be intensely coupled into an inner cladding layer of a double clad fiber. In this paper, we introduce an efficient pump beam combiner based on single mode fibres.
{"title":"Pump beam combiner based on single mode fibres","authors":"H. Seo, J. Ahn, B. Park","doi":"10.1109/CLEOE-EQEC.2009.5192768","DOIUrl":"https://doi.org/10.1109/CLEOE-EQEC.2009.5192768","url":null,"abstract":"Cladding pumped fibre lasers have been rapidly researched and developed with help of semiconductor laser diode bar and stack [1]. Especially these fiber lasers showed a high power conversion efficiency of about ∼80% in case of Yb-doped double clad fiber laser and a high-quality beam of M2 ≈ 1. Output power of a fiber laser is determined by how much a pump light can be intensely coupled into an inner cladding layer of a double clad fiber. In this paper, we introduce an efficient pump beam combiner based on single mode fibres.","PeriodicalId":346720,"journal":{"name":"CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114969301","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 : 2009-06-14DOI: 10.1109/CLEOE-EQEC.2009.5191536
I. Gatare, H. Thienpont, K. Panajotov
We experimentally report on dynamics of two mutually coupled vertical-cavity surface-emitting lasers (VCSEL) operating in the parallel injection scheme, i.e., the polarizations of the free-running VCSEL1 and VCSEL2 are parallel to each other. The VCSELs are biased such that their free-running output powers are matched and they operate around 852 nm. The evolution of nonlinear dynamics and synchronization mechanisms is investigated when varying the coupling strength κinj for different detunings Δν = ν1 − ν2 [where ν1 and ν2 are, respectively, the frequency of the free-running VCSEL1 and VCSEL2).
{"title":"Nonlinear dynamics and synchronization in two mutually coupled vertical-cavity surface-emitting lasers","authors":"I. Gatare, H. Thienpont, K. Panajotov","doi":"10.1109/CLEOE-EQEC.2009.5191536","DOIUrl":"https://doi.org/10.1109/CLEOE-EQEC.2009.5191536","url":null,"abstract":"We experimentally report on dynamics of two mutually coupled vertical-cavity surface-emitting lasers (VCSEL) operating in the parallel injection scheme, i.e., the polarizations of the free-running VCSEL<inf>1</inf> and VCSEL<inf>2</inf> are parallel to each other. The VCSELs are biased such that their free-running output powers are matched and they operate around 852 nm. The evolution of nonlinear dynamics and synchronization mechanisms is investigated when varying the coupling strength κ<inf>inj</inf> for different detunings Δν = ν<inf>1</inf> − ν<inf>2</inf> [where ν<inf>1</inf> and ν<inf>2</inf> are, respectively, the frequency of the free-running VCSEL<inf>1</inf> and VCSEL<inf>2</inf>).","PeriodicalId":346720,"journal":{"name":"CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115298671","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 : 2009-06-14DOI: 10.1109/CLEOE-EQEC.2009.5194125
S. Osborne, A. Amann, S. O'Brien
An experimental study of multimode dynamics in a two-mode semiconductor laser with optical injection is presented. The device we consider is a specially engineered two-colour Fabry-Perot laser diode [Eblana Photonics] with a large (THz) primary mode spacing. At a fixed injected power level, we vary the detuning of the injected field from the long wavelength mode of the device. The optical spectra of the two primary modes are shown as a function of the frequency detuning of the injected signal in Fig. 1 (left).
{"title":"Multimode dynamics in a semiconductor laser with optical injection","authors":"S. Osborne, A. Amann, S. O'Brien","doi":"10.1109/CLEOE-EQEC.2009.5194125","DOIUrl":"https://doi.org/10.1109/CLEOE-EQEC.2009.5194125","url":null,"abstract":"An experimental study of multimode dynamics in a two-mode semiconductor laser with optical injection is presented. The device we consider is a specially engineered two-colour Fabry-Perot laser diode [Eblana Photonics] with a large (THz) primary mode spacing. At a fixed injected power level, we vary the detuning of the injected field from the long wavelength mode of the device. The optical spectra of the two primary modes are shown as a function of the frequency detuning of the injected signal in Fig. 1 (left).","PeriodicalId":346720,"journal":{"name":"CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115410864","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 : 2009-06-14DOI: 10.1109/CLEOE-EQEC.2009.5192378
B. Orr, Yabai He, Richard T. White, M. Kono, K. Baldwin
There is a need in the context of high-resolution laser spectroscopy for pulsed, tunable, single-longitudinal-mode (SLM) coherent light sources with high peak power and narrow optical bandwidth. This holds particularly in the vacuum ultraviolet (VUV) region, where nonlinear-optical (NLO) upconversion is essential to generate required wavelengths. For instance, narrowband 120-nm VUV radiation, generated by pulsed dye amplification of a cw tunable Ti:sapphire laser and NLO upconversion, has been used [1] to measure the 2 1S ← 1 1S two-photon absorption transition of helium (He) as a test of quantum-electrodynamic theory.
{"title":"High-performance amplification of coherent ∼25-ns light pulses from a tunable source operating at ∼840 nm with bandwidth near the Fourier limit","authors":"B. Orr, Yabai He, Richard T. White, M. Kono, K. Baldwin","doi":"10.1109/CLEOE-EQEC.2009.5192378","DOIUrl":"https://doi.org/10.1109/CLEOE-EQEC.2009.5192378","url":null,"abstract":"There is a need in the context of high-resolution laser spectroscopy for pulsed, tunable, single-longitudinal-mode (SLM) coherent light sources with high peak power and narrow optical bandwidth. This holds particularly in the vacuum ultraviolet (VUV) region, where nonlinear-optical (NLO) upconversion is essential to generate required wavelengths. For instance, narrowband 120-nm VUV radiation, generated by pulsed dye amplification of a cw tunable Ti:sapphire laser and NLO upconversion, has been used [1] to measure the 2 1S ← 1 1S two-photon absorption transition of helium (He) as a test of quantum-electrodynamic theory.","PeriodicalId":346720,"journal":{"name":"CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference","volume":"130 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123129876","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 : 2009-06-14DOI: 10.1109/CLEOE-EQEC.2009.5192379
M. Tsunekane, T. Taira
The compact, high brightness passively Q-switched micro-lasers end-pumped by fiber-coupled LDs were developed for ignition of engines. The brightness of the micro-laser was calculated to be 0.3PW/sr-cm2 and the focused optical power intensity is estimated to be 5TW/cm2 at the pulse energy of 2.7mJ. The short pulse width of 600ps and the high beam quality of M2=1.2 can successfully reduce the ignition energy and then the laser head size comparable to a spark plug. In addition the micro-laser igniter demonstrated the acceleration of combustion and the ignition for leaner mixture gas due to the absence of electrodes. [1–5]
{"title":"High temperature operation of passively Q-switched, Cr:YAG/Nd:YAG micro-laser for ignition of engines","authors":"M. Tsunekane, T. Taira","doi":"10.1109/CLEOE-EQEC.2009.5192379","DOIUrl":"https://doi.org/10.1109/CLEOE-EQEC.2009.5192379","url":null,"abstract":"The compact, high brightness passively Q-switched micro-lasers end-pumped by fiber-coupled LDs were developed for ignition of engines. The brightness of the micro-laser was calculated to be 0.3PW/sr-cm2 and the focused optical power intensity is estimated to be 5TW/cm2 at the pulse energy of 2.7mJ. The short pulse width of 600ps and the high beam quality of M2=1.2 can successfully reduce the ignition energy and then the laser head size comparable to a spark plug. In addition the micro-laser igniter demonstrated the acceleration of combustion and the ignition for leaner mixture gas due to the absence of electrodes. [1–5]","PeriodicalId":346720,"journal":{"name":"CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115755761","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 : 2009-06-14DOI: 10.1109/CLEOE-EQEC.2009.5194616
C. Schmidt, A. Chipouline, T. Kasebier, E. Kley, A. Tunnermann, L. Deych, T. Pertsch
Micro resonators of different topologies are of interest due to their potential applications as components in future generations of optoelectronic circuits [1]. The high quality factors in combination with small mode volume allow resonators to collect high intensities at rather moderate levels of coupled light [2]. Raman scattering [3], parametric effects [4], and thermal nonlinearity [5] have been investigated both experimentally and theoretically. The thermal nonlinearity has lowest threshold and causes bistable behavior [6]. In this work a bistable operation of silica micro disc resonators and hybrid ones made of silica/silicon has been investigated experimentally. It has been found, that in a hybrid silica/silicon micro resonators a bistability effect has an opposite sign in comparison with a silica disc micro resonator. The bistable behavior of silica micro resonators [6] caused by a thermal nonlinearity exhibits transmission spectrum shift into a longer wavelength region. This corresponds to a positive numerical refractive index temperature derivative for silica. In our experiments a new type of disc micro resonators - hybrid silica/silicon ones - has been produced (see Fig. 1). It is clearly seen, that under a silica layer there is a layer of silicon, which has higher refractive index and thus the eigen mode of such structure tends to be concentrated inside the silicon layer.
{"title":"Nonlinear optical response of silica and hyybrid silica/silicon disc micro resonators","authors":"C. Schmidt, A. Chipouline, T. Kasebier, E. Kley, A. Tunnermann, L. Deych, T. Pertsch","doi":"10.1109/CLEOE-EQEC.2009.5194616","DOIUrl":"https://doi.org/10.1109/CLEOE-EQEC.2009.5194616","url":null,"abstract":"Micro resonators of different topologies are of interest due to their potential applications as components in future generations of optoelectronic circuits [1]. The high quality factors in combination with small mode volume allow resonators to collect high intensities at rather moderate levels of coupled light [2]. Raman scattering [3], parametric effects [4], and thermal nonlinearity [5] have been investigated both experimentally and theoretically. The thermal nonlinearity has lowest threshold and causes bistable behavior [6]. In this work a bistable operation of silica micro disc resonators and hybrid ones made of silica/silicon has been investigated experimentally. It has been found, that in a hybrid silica/silicon micro resonators a bistability effect has an opposite sign in comparison with a silica disc micro resonator. The bistable behavior of silica micro resonators [6] caused by a thermal nonlinearity exhibits transmission spectrum shift into a longer wavelength region. This corresponds to a positive numerical refractive index temperature derivative for silica. In our experiments a new type of disc micro resonators - hybrid silica/silicon ones - has been produced (see Fig. 1). It is clearly seen, that under a silica layer there is a layer of silicon, which has higher refractive index and thus the eigen mode of such structure tends to be concentrated inside the silicon layer.","PeriodicalId":346720,"journal":{"name":"CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125199429","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 : 2009-06-14DOI: 10.1109/CLEOE-EQEC.2009.5191709
M. Maragkou, A. Grundy, E. Wertz, J. Bloch, P. Lagoudakis
Semiconductor micropillars offer an interesting way of studying polaritons in zero-dimensional cavities [1,2]. In such cavities, photons are confined vertically, by the Bragg mirrors, and laterally by the index of refraction contrast between the air and the semiconductor. Zero dimensional polariton modes are the result of this three-dimensional confinement [3,4]. The first observation of polariton lasing in a GaAs micropillar showed single mode operation, with lasing from the lowest energy mode in the system [5]. We demonstrate that by careful engineering of the system, competing relaxation mechanisms can be used to achieve lasing from higher energy modes.
{"title":"Mode selection in GaAs micropillar polariton lasers","authors":"M. Maragkou, A. Grundy, E. Wertz, J. Bloch, P. Lagoudakis","doi":"10.1109/CLEOE-EQEC.2009.5191709","DOIUrl":"https://doi.org/10.1109/CLEOE-EQEC.2009.5191709","url":null,"abstract":"Semiconductor micropillars offer an interesting way of studying polaritons in zero-dimensional cavities [1,2]. In such cavities, photons are confined vertically, by the Bragg mirrors, and laterally by the index of refraction contrast between the air and the semiconductor. Zero dimensional polariton modes are the result of this three-dimensional confinement [3,4]. The first observation of polariton lasing in a GaAs micropillar showed single mode operation, with lasing from the lowest energy mode in the system [5]. We demonstrate that by careful engineering of the system, competing relaxation mechanisms can be used to achieve lasing from higher energy modes.","PeriodicalId":346720,"journal":{"name":"CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference","volume":"389 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116646457","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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