Session Index

Quantum Electronics and Laser Technology

Quantum Electronics and Laser Technology I
Thursday, Dec. 2, 2021  13:15-15:00
Presider: Prof. Ming-Chang Shih (施明昌)/Prof. Meng-En Lee (李孟恩)
Room: 303a
13:15 - 13:30 Award Candidate (Paper Competition)
Manuscript ID.  0488
Paper No.  2021-THU-S0301-O001
Lu-Ching Hsueh Development of Integrated Optoelectrical Amplifier and High Resolution Smart Thermal Sensor with Light-Emitting Transistors
Lu-Ching Hsueh;Sheng-Wen Cheng;Hsin-Yu Lin;Mukul Kumar;Chao-Hsin Wu

The study investigates the current gain (β) and optical light output between InGaP / GaAs light-emitting transistors (LETs) at different temperatures. From ambient temperature to 358K, the Darlington LET's current gain (β) improves 94.11%, which is desirable for the high resolution smart thermal sensor. Finally, we made the first optoelectrical amplifier in the world using LET.

13:30 - 13:45 Award Candidate (Paper Competition)
Manuscript ID.  0533
Paper No.  2021-THU-S0301-O002
Yu-Chieh Lo THz Dielectric-grating Free-electron Laser
Yu-Chieh Lo;Wen-Chi Chen;Xuan-Long Ho;Alex Kopeykin;Chia-Hsiang Chen;Yen-Chieh Huang

We report the design and fabrication of a dielectric-grating waveguide driven by 40-keV electrons to emit narrow-line radiation at 0.56 THz. With a current density of 8 A/cm2, the coherent THz radiation builds up from bunched electrons in about 2 ns.

13:45 - 14:00 Award Candidate (Paper Competition)
Manuscript ID.  0122
Paper No.  2021-THU-S0301-O003
Hanling Tsay Random-modulated pulsed lidar based on transient response of gain-switched semiconductor lasers and homodyne interference
Hanling Tsay;Fanyi Lin

We generate and analyze random-modulated pulses based on the transient response of a gain-switched semiconductor laser and homodyne interference for pulsed lidar applications. Benefited by the low-correlated waveforms, lidars utilizing random-modulated pulses possess the advantages of no range ambiguity and immune to interference. With proper control of the laser drive current and the length of the homodyne delay, we successfully generate low-correlated random-modulated pulses suitable for the pulsed lidar applications. In compliance with the class-1 eye-safe regulation, 3D imaging with millimeter precision revealing the details of a hand is demonstrated.

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14:00 - 14:15 Award Candidate (Paper Competition)
Manuscript ID.  0035
Paper No.  2021-THU-S0301-O004
Meng Ting Han Off-normal Lasing in High Contrast Grating Membrane via Bound States in the Continuum
Meng Ting Han

Bound states in the continuum (BIC) have been attracted scientists to study intensive research due to its unique characteristics which are significant for both fundamental physics and practical applications. By using the mechanism of Friedrich-Wintgen BIC, we can realize the off-normal lasing with variable emission angles.

14:15 - 14:30 Award Candidate (Paper Competition)
Manuscript ID.  0554
Paper No.  2021-THU-S0301-O005
Tien-Dat Pham Ti:PPLN Heralded Single Photon Sources Integrated With Adiabatic Passage Couplers
Tien-Dat Pham;Yang-Teng Li;Yen-Ru Chen;Hung-Pin Chung;Chih-Sung Chuu;Yen-Hung Chen

We demonstrate an on-chip heralded single photon source based on a type-II periodically poled lithium niobate (PPLN) spontaneous parametric down-converter (SPDC) and a 7-waveguide adiabatic coupler system, integrated in a Ti-diffused LiNbO3 waveguide platform. The PPLN SPDC generates cross-polarized photon pairs when pumped at 785 nm, while the adiabatic coupler system works both as a pump filter and a broadband polarizing mode splitter. The photon pair generation rate of such an integrated SPDC source is estimated to ~10^4 s^(-1) at a pump power of 4.5 uW.

14:30 - 14:45 Award Candidate (Paper Competition)
Manuscript ID.  0098
Paper No.  2021-THU-S0301-O006
Chia-Lun Tsai 23-fs, 3-kHz, 0.44-mJ pulses at 515-nm generated by nonlinear pulse compression in a gas-filled chamber
Chia-Lun Tsai;Liang-Xian Xie;An-Yuan Liang;Shih-Cheng Liu;Ming-Shiang Tsai;Ming-Chang Chen

Nonlinear pulse compression is used to generate 23 fs, 0.44 mJ ultrafast green pulses from an Yb:KGW solid state regenerative amplifier. By passing through an Ar-filled gas filled chamber, the original spectrum is broadened. Then, chirp mirrors are used to compensate the spectral phases.