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13:15 - 13:45
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Manuscript ID. 0813
Paper No. 2020-THU-S0301-I001
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Invited Speaker:
Wang-Yau Cheng
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Stabilizing mode locked laser directly reference to atomic two photon transition- toward developing 104 clocks utilizing one Cs-Rb mixed cell
Tz-Wei Liu;Hsin-Hung Yu;Bo-Wei Chen;Wang-Yau Cheng
We directly lock the mode frequency of comb laser against atomic transition recommended by BIPM. Here we report a 6-cm Rb-Cs mixed cell based comb clocks and the investigations on related systematic errors, in which new technologies for removing the Doppler background and for controlling the comb frequency are presented.
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13:45 - 14:00
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Manuscript ID. 0071
Paper No. 2020-THU-S0301-O001
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Wei-Hao Huang
Award Candidate
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Comparisons between Anti-Guiding and Guiding Effects in GaN-Based Vertical-Cavity Surface-Emitting Lasers
Wei-Hao Huang;Lih-Ren Chen;Bo-Yan Chen;Tien-Chang Lu
We optimize the lateral optical confinement effect on the guiding structure of GaN-based VCSELs, eliminating diffraction loss and enhancing the laser characteristics in comparison to the anti-guiding structure of VCSEL. Throughout the study, we show the advantage of the guiding structure both theoretically and experimentally.
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14:00 - 14:15
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Manuscript ID. 0473
Paper No. 2020-THU-S0301-O002
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Zuhaib Khan
Award Candidate
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High-brightness, single-mode and single-polarized VCSEL arrays using backside electroplating process
Zuhaib Khan;Yong Hao Chang;Yen-Yu Huang;Yuan-Cheng Zhao;Jin-Wei Shi
We demonstrate a novel high-power VCSEL array with highly single-mode (SMSR>50 dB) and single-polarized output having very narrow divergence angle (1/e2: ~10o), high output power (3.1 Watt; 1% duty cycle) and can sustain single polarization state with polarization suppression ratio of (9 dB) under full range of bias currents.
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14:15 - 14:30
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Manuscript ID. 0468
Paper No. 2020-THU-S0301-O003
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Yong Hao Chang
Award Candidate
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High-brightness, high-speed, high wall-plug efficiency VCSEL arrays using inter-mesas waveguide
Yong Hao Chang;Zuhaib Khan;Yen Yu Huang;Yuan Cheng Zhao;Jin Wei Shi
We demonstrate a novel high-efficiency, high-speed and high-brightness VCSEL array using Zn-diffusion, oxide-relief aperture and additional passive optical waveguides. Furthermore, narrow divergence angle (FWHM: ~6o), high wall plug efficiency (22%), large output power (90 mW at 170mA), clear eye-opening and wide 3-dB E-O bandwidth (10 GHz) can also be achieved.
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14:30 - 14:45
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Manuscript ID. 0321
Paper No. 2020-THU-S0301-O004
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Yi-Xin Lin
Award Candidate
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Ultra-broadband thin-film lithium niobate adiabatic couplers
Yi-Xin Lin;Hung-Pin Chung;Hua-Kung Chiu;Mohammadreza Younesi;Reinhard Geiss;Frank Setzpfandt;Thomas Pertsch;Yen-Hung Chen
We report the first observation of counterintuitive adiabatic light transfer in a thin-film lithium niobate on insulator (LNOI) platform. A broad coupling bandwidth of 100 nm across telecom E, S, and C bands in an average coupling efficiency of 90% was obtained with this 400-µm-long nanometric LNOI waveguide adiabatic coupler.
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