Session Index

S3. Quantum Electronics and Laser Technology

Quantum Electronics and Laser Technology VI
Sunday, Dec. 3, 2023  09:00-11:00
Presider: Prof. Yu-Hsun Chou (National Cheng Kung University, Taiwan) Prof. Yu-Han Hung (National Sun Yat-sen University, Taiwan)
Room: 92177 (1F)
09:00 - 09:30
Manuscript ID.  1082
Paper No.  2023-SUN-S0306-I001
Invited Speaker:
Ming-Chang Chen
Unveiling the Attosecond Revolution: A Historical Overview and Modern Applications
Ming-Chang Chen, National Tsing Hua University (Taiwan)

The 2023 Nobel Prize in Physics was awarded jointly to Drs. Pierre Agostini, Ferenc Krausz, and Anne L’Huillier for their pioneering work in attosecond science. This talk will trace the history of attosecond science from its inception to the present day, highlighting key milestones and influential figures. We then delve into the contemporary applications of attosecond science, demonstrating how attosecond pulses have transformed the study of ultrafast processes. These applications encompass electron dynamics in atoms, molecules, and materials, enabling insights into chemical reactions and structural changes on timescales previously inaccessible. In addition, we highlight the notable contributions and developments in attosecond science within Taiwan, underscoring the global impact of this rapidly advancing field.

  Preview abstract
09:30 - 09:45
Manuscript ID.  0031
Paper No.  2023-SUN-S0306-O001
Wei Zong Feng Enhanced Impulsive Stimulated Raman Scattering Signal Using Spectrally Overlapped Pump and Probe Pulses
Wei Zong Feng, Jui-Chen Yen, National Tsing Hua University (Taiwan); Kai Chen, Victoria University of WellingtonWellington (New Zealand); Chih-Hsuan Lu, Bo-Han Chen, Li-Kang Chu, Shang Da Yang, National Tsing Hua University (Taiwan)

Impulsive Stimulated Raman Scattering (ISRS) is a time-domain spectroscopic technique for studying molecular vibrations, which has superior sensitivity to traditional Raman spectroscopy. We achieve high-resolution observation of molecular vibration using the ultrashort pump and probe pulses. In our experiment, we kept the pump pulse duration fixed at 15 fs while varying its central wavelength. This approach confirms the enhancement of the Raman signal in the spectral region where the pump and probe overlap, consistent with the theoretical model and qualitative descriptions.

  Preview abstract
09:45 - 10:00
Manuscript ID.  0577
Paper No.  2023-SUN-S0306-O002
Charles W. Tu Bandgap engineering of GaAsSb/InGaAs MQW with and without strain compensation for 1 μm
Charles W. Tu, Zhen-Lun Li, Zon ., Tzu-Wei Lo, Chun-Nien Liu, National Chung Hsing University (Taiwan); Chun-De Chiang, Li-Wei Hung, Ming-Sen Hsu, Ltd. (Taiwan); Wei-Sheng Liu, Yuan Ze University (Taiwan); Jen-Inn Chyi, Chao-Jia Cheng, National Central University (Taiwan)

In this study, we demonstrate bandgap engineering of InGaAs/GaAsSb multi-quantum well (MQW) structure grown on GaAs substrates for achieving emission wavelength above 1 μm. Three different structures were grown by molecular-beam epitaxy (MBE). Bandgap engineering simulations were carried out using COMSOL to identify the potential growth parameters for achieving wavelength of 1.3 μm.

  Preview abstract
10:00 - 10:15
Manuscript ID.  0387
Paper No.  2023-SUN-S0306-O003
Cheng-Yu Lin Self-stabilized 1220nm Femtosecond Light Source based on a Photonic-crystal Fiber
Cheng-Yu Lin, Bo-Ru Zhao, Chi-Kuang Sun, National Taiwan University (Taiwan)

In this article, we demonstrate a self-stabilized all-fiber-based femtosecond laser light source for harmonic generation microscopy. By utilizing self-phase modulation in a photonic crystal fiber and feedback control, the 1220 nm femtosecond source accomplished week-long steady output power performance.

  Preview abstract
10:15 - 10:30
Manuscript ID.  0273
Paper No.  2023-SUN-S0306-O004
Ya-Po Yang Characterization of energetic 10.2-µm pulses for seeding terawatt-class CO2 amplifiers
Ya-Po Yang, Jheng-Yu Lee, Jyhpyng Wang, Academia Sinica (Taiwan), National Central University (Taiwan)

We demonstrate a novel approach to energetic picosecond 10.2-µm pulse generation
based on nonlinear mixing of subnanosecond single-frequency 1338-nm pulses and broadband
1540-nm chirped pulses in a BGGSe crystal followed by a grating compressor for seeding high-
power CO2 amplifiers. 10.2-µm pulses with an energy exceeding 30-µJ, and their fluctuation is
∼3%-rms are produced routinely. On the basis of the measured pulse spectrum and a single-shot
pulse duration measurement, performed by Kerr polarization rotation time-resolved by a streak
camera, we conclude the measured pulse width is between 2.2-3 ps.

  Preview abstract
10:30 - 10:45
Manuscript ID.  0411
Paper No.  2023-SUN-S0306-O005
Te-Hua Liu Realizing High Efficiency, Ensuring Wavelength Stability, and Achieving Watt-Level Pulsed Power in a 1.55-μm DFB Laser
Te-Hua Liu, Sung-Pu Yang, National Taiwan University (Taiwan); Jau-Yang Wu, Yuan Ze University (Taiwan); Chao-Hsin Wu, National Taiwan University (Taiwan)

We demonstrate a high-efficiency 1.55-μm buried heterostructure distributed feedback (BH-DFB) laser. Optimization of the LD structure demonstrated a threshold current of 12 mA and a differential slope efficiency of 0.433 W/A. Under high current and wide temperature conditions, its single-mode optical spectrum remains intact. From a single active region, the laser produces 6.27 W of optical power, which can be verified by pulsed signals. With attributes of high efficiency, singular modal spectra, eye-safety wavelengths, and watt-level optical power, this laser is a promising option for LiDAR systems.

  Preview abstract
10:45 - 11:00
Manuscript ID.  0559
Paper No.  2023-SUN-S0306-O006
Meng Ling Chuang Whispering-gallery-mode lasing in CsPbBr3 perovskite quantum dots coated microspheres
Meng Ling Chuang, Zi-Lian Shen, Sheng-Chan Wu, National Cheng Kung University (Taiwan); Meng-Cheng Yen, National Taiwan University (Taiwan), National Yang Ming Chiao Tung University (Taiwan); Sheng Hung, National Yang Ming Chiao Tung University (Taiwan); Ya-Ju Lee, National Cheng Kung University (Taiwan); Ching-Hang Chien, National Yang Ming Chiao Tung University (Taiwan); Hsu-Cheng Hsu, National Cheng Kung University (Taiwan)

Cesium lead halide perovskite quantum dots (PQDs) in the all-inorganic form, CsPbX3 (where X = Cl, Br, I), exhibit remarkable optical characteristics suitable for diverse optoelectronic applications. Whispering-gallery-mode (WGM) resonators demand high symmetry, minimal loss, and a high-quality factor (Q). This research capitalizes on the strengths of both PQDs and WGM resonators by uniformly applying PQDs onto SiO2 microspheres. We studied resonant behavior across differently sized WGM cavities and explored resonance characteristics under varying polarizations in-depth. The simulations confirm the consistency of experimental WGM modes.

  Preview abstract