Session Index

S3. Quantum Electronics and Laser Technology

Poster Session I
Friday, Dec. 1, 2023  13:30-16:30
Room: Building of Electrical Engineering (電機系館) (B1)
Award Candidate (Paper Competition)
Manuscript ID.  0361
Paper No.  2023-FRI-P0301-P001
Bao-Te Chen Observation of shared signal wave resonance in CW intracavity quasi-phase-matching OPO with dual-wavelength pump wave input
Bao-Te Chen, Chun-Yu Cho, National United University (Taiwan)

An efficient dual-wavelength CW mid-infrared laser is demonstrated using an intracavity optical parametric oscillator (OPO). By using the dual-wavelength pump wave from a composite Nd:YVO4/Nd:GdVO4 gain medium, the quasi-phase-matched (QPM) OPO process is found to have shared resonance at signal wave share for reducing threshold power.

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Award Candidate (Paper Competition)
Manuscript ID.  0255
Paper No.  2023-FRI-P0301-P002
Yu-Cheng Song Realization of a compact 10-W 976-nm ytterbium-doped all-fiber laser
Yu-Cheng Song, National Cheng Kung University (NCKU) (Taiwan), Industrial Technology Research Institute (Taiwan); Zhi-Cheng Lee, National Cheng Kung University (NCKU) (Taiwan); Shih-Ting Lin, Industrial Technology Research Institute (Taiwan); Yu-Che Tang, Tzong-Yow Tsai, National Cheng Kung University (NCKU) (Taiwan)

We have demonstrated a compact and cost-effective ytterbium-doped all-fiber laser operating at 976 nm. By utilizing a commercially available ytterbium-doped fiber with a length of only 18 cm, we achieved a lasing power of 10.3 W, with a slope efficiency of 25.4%. To our knowledge, our work presents the shortest gain fiber ever documented in the literature capable of delivering tens-of-watt 976-nm lasing power. The design is compatible with conventional fiber components, simplifying the monolithic assembly process. Notably, the incorporation of such a short gain fiber obviated the need for additional measures to suppress the strong 1.03-μm emission.

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Award Candidate (Paper Competition)
Manuscript ID.  0312
Paper No.  2023-FRI-P0301-P003
Po-I Lee Square-Wave Generation in Semiconductor Lasers under Optical Injection and Optoelectronic Feedback
Po-I Lee, Yu-En Xiao, Yu-Hen Chiu, Wei-Han Chang, Yu-Shan Juan, Yuan Ze University (Taiwan)

A hybrid system is proposed in this study, which combines optical injection and optoelectronic feedback to generate a square-wave signal while analyzing the relationship between the delay time of modulation and the frequency and waveform. In addition, the impact of frequency peak density on the flatness of the square waveform is investigated. This research provides a new option for existing square-wave signal generation techniques and has the opportunity to reduce the cost and complexity of future signal generation and electronic equipment.

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Award Candidate (Paper Competition)
Manuscript ID.  0564
Paper No.  2023-FRI-P0301-P004
Cheng-Chang Hsu High-harmonic Generation For Water Window Regime X-ray Using Wavelength 270-nm Pump Laser
Cheng-Chang Hsu, Yao-Li Liu, National Cheng Kung University (Taiwan); Hsu-Hsin Chu, National Central University (Taiwan)

Focusing the laser pulse into a capillary filled with neon gas for interaction, and generating phase-matched HHG in the water window by balancing plasma dispersion with dipole phase. The result of using ANSYS to simulate the flow field in the capillary show that this design can achieve the gas density distribution required for the experiment.

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Award Candidate (Paper Competition)
Manuscript ID.  0703
Paper No.  2023-FRI-P0301-P005
Yin-Pei Chen LED-pumped eye-safe pulse laser with an extracavity optical parametric oscillator
Yin-Pei Chen, Ching-Han Chang, Kai-Ting Yen, Ai-Ling Li, Yang-Rong Li, Kuan-Wei Su, National Yang Ming Chiao Tung University (Taiwan)

An LED-side-pumped Nd: YAG/Cr4+: YAG passively Q-switched (PQS) laser containing an extracavity optical parametric oscillator (EOPO) is demonstrated. The PQS pulse energy is optimized to 24 mJ at 1064 nm. By using the double-pass EOPO operation, the pump-to-signal conversion efficiency increases to 45.8%, the output energy of the signal pulse is up to 10.98 mJ with a pulse width of 23.5ns, and the peak power is 459kW. This study demonstrates the possibility of using LED-pumped eye-safe lasers to achieve low-cost, long-range flash LiDAR systems.

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Award Candidate (Paper Competition)
Manuscript ID.  0204
Paper No.  2023-FRI-P0301-P006
Min-Ci Liao Employment of Silicon Photonics Micro-Ring Resonator and Electro-Absorption Modulator for 40 GHz Active/Passive Mode-locked Fiber Laser
Min-Ci Liao, Yi-Jang Hsu, Yun-Xin Chen, Yinchieh Lai, National Yang Ming Chiao Tung University (Taiwan)

A new mode-locked fiber laser configuration based on a silicon-photonics micro- ring cascaded with an electro-absorption-modulator is carefully examined. We experimentally demonstrate both active and passive mode-locking operation in the same configuration. The distinctive features of the laser are the highly stable pulse train and the wide coherent optical comb spectrum.

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Award Candidate (Paper Competition)
Manuscript ID.  0106
Paper No.  2023-FRI-P0301-P007
Po-Yang Chang Waveguide structure optimization of InGaN-based photonic crystal surface-emitting laser
Po-Yang Chang, Wen-Hsuan Hsieh, Teng-Li Shao, Tien-Chiu Chen, Hung-Chang Hsieh, Tien-Chang Lu, Chia-Yen Huang, National Yang Ming Chiao Tung University (Taiwan)

We optimized the waveguide structure of two types of InGaN-based photonic crystal surface-emitting laser (PCSEL) via optical mode simulation. In order to minimize threshold materials gain (gth), we calculated the confinement factor and quality factor of PCSEL with varying waveguide layer thicknesses in the separate confinement heterostructure (SCH). Optimal mode intensity profile revealed the coupling between the fundamental mode of SCH and parasitic leaky modes in the cladding layer or substrate as the main root cause of a low quality factor. With an optimized thickness design, gth of PCSEL with air voids in the n-side could be below 2000 cm-1.

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Award Candidate (Paper Competition)
Manuscript ID.  0310
Paper No.  2023-FRI-P0301-P008
Yu-En Xiao Chaotic Pulses Generation utilizing Semiconductor Lasers in Hybrid System
Yu-En Xiao, Po-I Lee, Yu-Hen Chiu, Wei-Han Chang, Yu-Shan Juan, Yuan Ze University (Taiwan)

In this paper, chaotic pulses are generated in semiconductor lasers subjected to both optoelectronic feedback and optical injection by numerical simulation. The detuning frequency between the two semiconductor lasers is the key factor to generate chaotic pulses. The chaotic pulses generated show the broad bandwidths of around 38 GHz and the magnitude drops are effectively reduced in frequency domain compared to the semiconductor laser only applying optoelectronic feedback loop.

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Award Candidate (Paper Competition)
Manuscript ID.  0470
Paper No.  2023-FRI-P0301-P009
Shun wen Zheng Bio-tissue inspired flexibility random laser from all-Inorganic Perovskite Quantum Dots
Shun wen Zheng, Shao-Chien Pan, Ja-Hon Lin, National Taipei University of Technology (Taiwan)

We investigated the random lasing characteristics of cesium lead bromide quantum dots (CsPbBr3 QDs) on patterned silk fibroin (SF) films. The patterned SF film was produced from nanocasting of rose-petal. By applying mechanical stress on the flexible PET substrate, the flexible RL was demonstrated with a 7.7 nm blue-shift relative to the flat CsPbBr3 QDs/SF film.

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Award Candidate (Paper Competition)
Manuscript ID.  0744
Paper No.  2023-FRI-P0301-P010
Yu-Long Lin Visible fs Laser Autocorrelation by UV photoiode
Yu-Long Lin, Chia-Yuan Chang, Shiuan-Yeh Chen, National Cheng Kung University (Taiwan)

The most common approach to investigate the pulse width of an ultrafast laser is through autocorrelation by either two-photon absorption (TPA) or second-harmonic generation (SHG). However, in comparison, SHG-based measurements are more inconvenient as they require a phase-matching condition and may necessitate a sensitive detector. Conversely, TPA-based measurements are simpler and more cost-effective, utilizing only a photodiode or light-emitting diode (LED). Our study employs an ultraviolet (UV) photodiode to generate the TPA signal and directly harvests the corresponding current through a source meter—eliminating the need for amplifiers, oscilloscopes, or data acquisition systems (DAS).

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Manuscript ID.  0554
Paper No.  2023-FRI-P0301-P011
Ming-Hsiung Wu Room-temperature Raman-suppressed High-power Narrow-line THz Parametric Source
Ming-Hsiung Wu, Cang-He Kuo, Yen-Chieh Huang, National Tsing Hua University (Taiwan)

At high power, stimulated Raman scattering competes with stimulated polariton scattering to saturate the THz-radiation output from a THz parametric source. We demonstrated the generation of ultra-high-power narrow-line THz radiation from KTP by suppressing the stimulated Raman scattering, achieving 17.2-μJ pulse energy over an ~80-ps pulse width at 5.7 THz.

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Manuscript ID.  0324
Paper No.  2023-FRI-P0301-P012
You-Xin Wang Precision DFBLD temperature feedback for error-free BPSK with long-term on-bit power/wavelength stabilization
Kuan-Wei Hu, National Taiwan University (Taiwan); Chih-Hsien Cheng, National Institute of Information and Communications Technology (Japan); You-Xin Wang, National Taiwan University (Taiwan); Gong-Ru Lin, National Taiwan University (Taiwan), Tektronix Inc. and National Taiwan University (Japan)

A narrow-linewidth DFBLD with the <±0.0001°C feedback control exhibits an ultra-long-term wavelength stability of <0.1pm for secure BPSK encryption and decryption. The delay-interferometric decoding the BPSK security code with a bit-amplitude fluctuation of <0.5% is demonstrated to enable an error-free BER of <8.6×10^-10.

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Manuscript ID.  1124
Paper No.  2023-FRI-P0301-P013
Shih-Yu Hsiao Few-microjoule Femtosecond Pulse Postcompression through a Bulk-Based Multipass Cell
Shih-Yu Hsiao, Chia-Lun Tsai, Ming-Wei Lin, National Tsing Hua University (Taiwan); Shih-Hsuan Chia, National Yang Ming Chiao Tung University (Taiwan); Ming-Chang Chen, National Tsing Hua University (Taiwan)

The development of compact, efficient and high quality postcompression schemes for laser pulses of relatively low μJ-level energies is of particular interest for MHz high-repetition rate fiber lasers. Here, we demonstrated the use of an all-solid-state medium within a Herriott-type multi-pass cell to postcompress 3 uJ femtosecond pulses from 172 fs to 47 fs with an efficiency of 72%.

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