15 February 2018 Time stretch dispersive Fourier transform based single-shot pulse-by-pulse spectrum measurement using a pulse-repetition-frequency-variable gain-switched laser
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Abstract
The time stretch dispersive Fourier Transform (TS-DFT) technique based on a fiber chromatic dispersion is a powerful tool for pulse-by-pulse single-shot spectrum measurement for highrepetition rate optical pulses. The distributed feedback laser diode (DFB-LD) with the gain switch operation can flexibly change the pulse repetition frequency (PRF). In this paper, we newly introduce a semiconductor gain-switched DFB-LD operating from 1 MHz up to 1 GHz PRF into the TS-DFT based spectrum measurement system to improve the flexibility and the operability. The pulse width can be below 2 ps with a pulse compression technique. We successfully measure the spectrum of each optical pulse at 1 GHz, 100 MHz, and 10 MHz PRF, and demonstrate the flexibility of the measurement system.
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Hideaki Furukawa, Hideaki Furukawa, Takeshi Makino, Takeshi Makino, Xiaomin Wang, Xiaomin Wang, Tetsuya Kobayashi, Tetsuya Kobayashi, Mohammad H. Asghari, Mohammad H. Asghari, Paul Trinh, Paul Trinh, Bahram Jalali, Bahram Jalali, Wai Sing Man, Wai Sing Man, Kwong Shing Tsang, Kwong Shing Tsang, Naoya Wada, Naoya Wada, } "Time stretch dispersive Fourier transform based single-shot pulse-by-pulse spectrum measurement using a pulse-repetition-frequency-variable gain-switched laser", Proc. SPIE 10517, Real-time Measurements, Rogue Phenomena, and Single-Shot Applications III, 1051709 (15 February 2018); doi: 10.1117/12.2289366; https://doi.org/10.1117/12.2289366
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