Pub Date : 2017-07-31DOI: 10.1109/CLEOPR.2017.8118944
Liao Chen, Haidong Zhou, Yuhua Duan, Xi Zhou, Chen Zheng, Chi Zhang, Xinliang Zhang
We propose and experimentally demonstrate a real-time broadband radio frequency (RF) spectrum analyzer. It achieves 800-GHz bandwidth, as well as 94-MHz frame rate, without sacrificing the resolution (1.25 GHz). It is capable of observing the multi-frequency at a single frame.
{"title":"A real-time broadband radio frequency spectrum analyzer based on time-lens","authors":"Liao Chen, Haidong Zhou, Yuhua Duan, Xi Zhou, Chen Zheng, Chi Zhang, Xinliang Zhang","doi":"10.1109/CLEOPR.2017.8118944","DOIUrl":"https://doi.org/10.1109/CLEOPR.2017.8118944","url":null,"abstract":"We propose and experimentally demonstrate a real-time broadband radio frequency (RF) spectrum analyzer. It achieves 800-GHz bandwidth, as well as 94-MHz frame rate, without sacrificing the resolution (1.25 GHz). It is capable of observing the multi-frequency at a single frame.","PeriodicalId":6655,"journal":{"name":"2017 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)","volume":"10 3","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2017-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91479764","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 : 2017-07-31DOI: 10.1109/CLEOPR.2017.8118796
Yurie Yoshida, T. Fukui, T. Ishigure
We fabricate polymer waveguides incorporated with europium-aluminum (Eu-Al) polymer composite with a simple procedure named the Mosquito method utilizing a micro-dispenser. Under a coaxial excitation condition, an optical gain as high as 15.7 dB is observed at 616-nm wavelength for a 4.9-cm long waveguide. Furthermore, the fabricated waveguides with different lengths exhibit higher gains as their lengths increase, even under repeated high-power excitations.
{"title":"Polymer waveguide incorporated with europium-aluminum polymer composite for compact and high-gain optical amplification devices","authors":"Yurie Yoshida, T. Fukui, T. Ishigure","doi":"10.1109/CLEOPR.2017.8118796","DOIUrl":"https://doi.org/10.1109/CLEOPR.2017.8118796","url":null,"abstract":"We fabricate polymer waveguides incorporated with europium-aluminum (Eu-Al) polymer composite with a simple procedure named the Mosquito method utilizing a micro-dispenser. Under a coaxial excitation condition, an optical gain as high as 15.7 dB is observed at 616-nm wavelength for a 4.9-cm long waveguide. Furthermore, the fabricated waveguides with different lengths exhibit higher gains as their lengths increase, even under repeated high-power excitations.","PeriodicalId":6655,"journal":{"name":"2017 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)","volume":"17 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2017-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80712180","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 : 2017-07-31DOI: 10.1109/CLEOPR.2017.8118993
Zhengrui Tu, D. Gao
A sharp fano resonance at 1550nm wavelength is realized with subwavelength grating waveguide micro-ring resonator structure. The theoretical simulation and experimental fabrication have been demonstrated in this paper. It has great potential for enhancing the sensitivity of sensors, realizing high-speed optical switch and forming optical bi-stability.
{"title":"Sharp fano resonance in subwavelength grating waveguide micro-ring resonator","authors":"Zhengrui Tu, D. Gao","doi":"10.1109/CLEOPR.2017.8118993","DOIUrl":"https://doi.org/10.1109/CLEOPR.2017.8118993","url":null,"abstract":"A sharp fano resonance at 1550nm wavelength is realized with subwavelength grating waveguide micro-ring resonator structure. The theoretical simulation and experimental fabrication have been demonstrated in this paper. It has great potential for enhancing the sensitivity of sensors, realizing high-speed optical switch and forming optical bi-stability.","PeriodicalId":6655,"journal":{"name":"2017 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)","volume":"11 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2017-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79690598","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 : 2017-07-31DOI: 10.1109/CLEOPR.2017.8118797
Yiding Lin, D. Ma, K. Lee, Shuyu Bao, J. Michel, C. S. Tan
Numerical study on the effect of an external stressor material, silicon nitride (SiN), on the tensile strain enhancement of Germanium waveguide-on-insulator (Ge WG-OI) was performed. The enhanced tensile strain shrinks Ge bandgap which leads to extension of optical absorption edge towards longer wavelength. It was found that 1GPa tensile SiN (400nm) would introduce ∼0.65% uniaxial tensile strain (along WG width direction) in Ge WG with 0.5μm width and extend the Γ-valley-light-hole absorption edge to ∼1658nm. Tensile strain-enhanced Ge WG-OI was also experimentally demonstrated. These studies pave the way for an on-chip tensile-strained Ge photodetector with improved performance comparable to InGaAs-based detectors. This technique is completely CMOS-compatible and could also be applied to other Ge-based on-chip active device design such as lasers.
{"title":"Extension of Germanium-on-insulator optical absorption edge using CMOS-compatible silicon nitride stressor","authors":"Yiding Lin, D. Ma, K. Lee, Shuyu Bao, J. Michel, C. S. Tan","doi":"10.1109/CLEOPR.2017.8118797","DOIUrl":"https://doi.org/10.1109/CLEOPR.2017.8118797","url":null,"abstract":"Numerical study on the effect of an external stressor material, silicon nitride (SiN), on the tensile strain enhancement of Germanium waveguide-on-insulator (Ge WG-OI) was performed. The enhanced tensile strain shrinks Ge bandgap which leads to extension of optical absorption edge towards longer wavelength. It was found that 1GPa tensile SiN (400nm) would introduce ∼0.65% uniaxial tensile strain (along WG width direction) in Ge WG with 0.5μm width and extend the Γ-valley-light-hole absorption edge to ∼1658nm. Tensile strain-enhanced Ge WG-OI was also experimentally demonstrated. These studies pave the way for an on-chip tensile-strained Ge photodetector with improved performance comparable to InGaAs-based detectors. This technique is completely CMOS-compatible and could also be applied to other Ge-based on-chip active device design such as lasers.","PeriodicalId":6655,"journal":{"name":"2017 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)","volume":"68 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2017-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82191882","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 : 2017-07-31DOI: 10.1109/CLEOPR.2017.8118972
V. Torres‐Company, C. Krückel, A. Fülöp, P. Andrekson
Silicon nitride waveguides are among the most promising platforms for nonlinear optical processing applications. In this invited contribution we will highlight how the dispersion and Kerr coefficient (n2) can be tuned by precisely controlling the stoichiometry of the waveguide's core material.
{"title":"Silicon-rich nitride waveguides for broadband nonlinear signal processing","authors":"V. Torres‐Company, C. Krückel, A. Fülöp, P. Andrekson","doi":"10.1109/CLEOPR.2017.8118972","DOIUrl":"https://doi.org/10.1109/CLEOPR.2017.8118972","url":null,"abstract":"Silicon nitride waveguides are among the most promising platforms for nonlinear optical processing applications. In this invited contribution we will highlight how the dispersion and Kerr coefficient (n2) can be tuned by precisely controlling the stoichiometry of the waveguide's core material.","PeriodicalId":6655,"journal":{"name":"2017 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)","volume":"361 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2017-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78974772","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 : 2017-07-31DOI: 10.1109/CLEOPR.2017.8119063
J. You, N. Panoiu
In this paper, a new approach is proposed to efficiently enhance the third-harmonic generation (THG) in graphene by employing a bilayer-grating structure. This scheme relies on the fact that the optical resonances of graphene structures are determined by the geometry. To boost the THG, we optimize the geometry of graphene bilayer gratings, thus achieving more than eight orders of magnitude enhancement of the THG intensity.
{"title":"A new scheme to enhance the third-harmonic generation in graphene","authors":"J. You, N. Panoiu","doi":"10.1109/CLEOPR.2017.8119063","DOIUrl":"https://doi.org/10.1109/CLEOPR.2017.8119063","url":null,"abstract":"In this paper, a new approach is proposed to efficiently enhance the third-harmonic generation (THG) in graphene by employing a bilayer-grating structure. This scheme relies on the fact that the optical resonances of graphene structures are determined by the geometry. To boost the THG, we optimize the geometry of graphene bilayer gratings, thus achieving more than eight orders of magnitude enhancement of the THG intensity.","PeriodicalId":6655,"journal":{"name":"2017 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)","volume":"155 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2017-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81338784","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 : 2017-07-31DOI: 10.1109/CLEOPR.2017.8118806
Qi Fu, Yuan Li, Jiajun Tian, Yong Yao
A novel method to realize two point fiber-optic ultrasonic sensor system has been demonstrated, which is based on fiber Bragg grating (FBG) in an erbium-doped fiber (EDF) ring laser (EFRL). There are two pairs of FBGs with different Bragg wavelength in this system. Each pair of FBGs has a long FBG (LFBG) and a short FBG (SFBG), which have an appropriate matching operating point and determine one potential lasing line. Two pairs of FBGs are used as both the comb filter and the ultrasonic sensors. Due to the different spectral response of the LFBG and SFBG to ultrasound, the cavity loss will change regularly by the ultrasound, and the intensity of the laser output will be modulated by the cavity loss. Meanwhile, an adjustable attenuator is added to the fiber ring cavity. By adjusting the attenuator, the gain and loss of the two specific wavelengths can be balanced, and the laser oscillation at two specific wavelengths is stabled. With the modulation of the adjustable attenuator, multiplexing ultrasonic EFRL sensors can be achieved within a single cavity fiber laser. The proposed method has been experimentally demonstrated by using a dual-channel laser system with a single section of gain medium, EDF.
{"title":"Dual-channel fiber ultrasonic sensor system based on fiber Bragg grating in an erbium-doped fiber ring laser","authors":"Qi Fu, Yuan Li, Jiajun Tian, Yong Yao","doi":"10.1109/CLEOPR.2017.8118806","DOIUrl":"https://doi.org/10.1109/CLEOPR.2017.8118806","url":null,"abstract":"A novel method to realize two point fiber-optic ultrasonic sensor system has been demonstrated, which is based on fiber Bragg grating (FBG) in an erbium-doped fiber (EDF) ring laser (EFRL). There are two pairs of FBGs with different Bragg wavelength in this system. Each pair of FBGs has a long FBG (LFBG) and a short FBG (SFBG), which have an appropriate matching operating point and determine one potential lasing line. Two pairs of FBGs are used as both the comb filter and the ultrasonic sensors. Due to the different spectral response of the LFBG and SFBG to ultrasound, the cavity loss will change regularly by the ultrasound, and the intensity of the laser output will be modulated by the cavity loss. Meanwhile, an adjustable attenuator is added to the fiber ring cavity. By adjusting the attenuator, the gain and loss of the two specific wavelengths can be balanced, and the laser oscillation at two specific wavelengths is stabled. With the modulation of the adjustable attenuator, multiplexing ultrasonic EFRL sensors can be achieved within a single cavity fiber laser. The proposed method has been experimentally demonstrated by using a dual-channel laser system with a single section of gain medium, EDF.","PeriodicalId":6655,"journal":{"name":"2017 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)","volume":"35 4 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2017-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82796326","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 : 2017-07-31DOI: 10.1109/CLEOPR.2017.8118762
Huei Teo, Jing Zhang, R. Wong, D. Hu, Zhifang Wu, Lei Wei, P. Shum
A simulation design was presented to optimise the model of long period grating based fibre devices. The simulation used a modified phase matching condition to better estimate the resonance wavelengths in the transmission profile. Experiments were conducted to verify the results obtained in the simulation. The experimental results matched closely with the simulations.
{"title":"Optimisation of long period fibre grating design","authors":"Huei Teo, Jing Zhang, R. Wong, D. Hu, Zhifang Wu, Lei Wei, P. Shum","doi":"10.1109/CLEOPR.2017.8118762","DOIUrl":"https://doi.org/10.1109/CLEOPR.2017.8118762","url":null,"abstract":"A simulation design was presented to optimise the model of long period grating based fibre devices. The simulation used a modified phase matching condition to better estimate the resonance wavelengths in the transmission profile. Experiments were conducted to verify the results obtained in the simulation. The experimental results matched closely with the simulations.","PeriodicalId":6655,"journal":{"name":"2017 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)","volume":"07 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2017-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85976182","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 : 2017-07-31DOI: 10.1109/CLEOPR.2017.8118994
He Zhang, J. Xia
A femtogram scale nanobeam optomechanical crystal (OMC) resonator operating in water is designed and demonstrated. The thermomechanical motion of the highly damped mechanical resonance in water can be resolved by the sensitive cavity optomechanical readout. The present device has an estimated mass sensitivity at the attogram level (1.33 ag/VHz) in water. A silicon nitride nanobeam OMC resonator with high optical Q-factor operating at visible wavelength is designed to improve the mass sensitivity.
{"title":"Femtogram scale nano-optomechanical resonators in water","authors":"He Zhang, J. Xia","doi":"10.1109/CLEOPR.2017.8118994","DOIUrl":"https://doi.org/10.1109/CLEOPR.2017.8118994","url":null,"abstract":"A femtogram scale nanobeam optomechanical crystal (OMC) resonator operating in water is designed and demonstrated. The thermomechanical motion of the highly damped mechanical resonance in water can be resolved by the sensitive cavity optomechanical readout. The present device has an estimated mass sensitivity at the attogram level (1.33 ag/VHz) in water. A silicon nitride nanobeam OMC resonator with high optical Q-factor operating at visible wavelength is designed to improve the mass sensitivity.","PeriodicalId":6655,"journal":{"name":"2017 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)","volume":"6 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2017-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78941572","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 : 2017-07-31DOI: 10.1109/CLEOPR.2017.8118775
T. Ohtsuki, Tomoya Yatsu, M. Matsuura
We have experimentally demonstrated all-optical wavelength conversion of PAM-4 signals based on cross gain modulation in a quantum-dot semiconductor optical amplifier. As a result, we have successfully achieved 5-nm regenerative wavelength conversion of 20-Gbit/s PAM-4 signals at the total required input power 4.8 dBm. Moreover, the improvement of BER with signal regeneration effect by uniforming the power intervals of the PAM-4 signal was successfully achieved.
{"title":"Regenerative wavelength conversion of PAM-4 signals using XGM with blue-shift filtering in a QD-SOA","authors":"T. Ohtsuki, Tomoya Yatsu, M. Matsuura","doi":"10.1109/CLEOPR.2017.8118775","DOIUrl":"https://doi.org/10.1109/CLEOPR.2017.8118775","url":null,"abstract":"We have experimentally demonstrated all-optical wavelength conversion of PAM-4 signals based on cross gain modulation in a quantum-dot semiconductor optical amplifier. As a result, we have successfully achieved 5-nm regenerative wavelength conversion of 20-Gbit/s PAM-4 signals at the total required input power 4.8 dBm. Moreover, the improvement of BER with signal regeneration effect by uniforming the power intervals of the PAM-4 signal was successfully achieved.","PeriodicalId":6655,"journal":{"name":"2017 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)","volume":"40 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2017-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85893861","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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