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Your search keyword '"Chen, Xiangfei"' showing total 14 results
Start Over Author "Chen, Xiangfei" Journal ieee journal of quantum electronics
14 results on '"Chen, Xiangfei"'

2. Engineering Spectrum of Mode Converter Based on Cascaded Bragg Gratings

Author

Chen Xiangfei, Yong Zhao, Shi Yuechun, Lianyan Li, Rulei Xiao, Zhanghua Han, and Ziming Hong

Subjects
Physics, Mode (statistics), Physics::Optics, 02 engineering and technology, Grating, Degrees of freedom (mechanics), Converters, Condensed Matter Physics, Atomic and Molecular Physics, and Optics, Spectral line, 020210 optoelectronics & photonics, Fiber Bragg grating, Band-pass filter, Wavelength-division multiplexing, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, Electrical and Electronic Engineering
Abstract

A method of engineering spectrum of mode converter based on cascaded Bragg gratings is investigated in detail. Due to the cascaded structures, the proposed mode converter owns higher design degrees of freedom comparing with mode converter based on traditional Bragg grating. Meanwhile, thanks to various light responses of gratings, conversion spectrum can be easily tailored by designing grating structures. As examples, mode converters with specific conversion spectra such as single-band pass, double-band pass, multi-band pass, narrow-band backward spectra have been designed. Besides, the same triangle-shaped band pass spectrum is obtained by two converters based on different grating structures with the aid of distribute-layer-peeling algorithm, which further shows the high design flexibility of the proposed method. We think the proposed method gives a new way for advanced mode converter with required conversion spectrum.

Published
2021

3. Uncooled Tunable Laser Based on High-Density Integration of Distributed Feedback Semiconductor Lasers

Author

Fan, Yaqiang, Liu, Jizhou, Xiao, Rulei, Gong, Yangyang, Sun, Zhenxing, Dai, Pan, Tang, Kaifei, Shi, Yuechun, and Chen, Xiangfei

Abstract

Most types of tunable lasers are sensitive to the ambient temperature and require thermoelectric coolers (TECs) for temperature control. For conventional tunable laser modules, high power consumption of cooling is required for stabilizing the laser temperature and complex hermetic packages are normally used to avoid moisture condensation problems, which are expensive and difficult to manufacture. To overcome these drawbacks, we demonstrated an uncooled tunable laser via the monolithically integrated multi-wavelength distributed feedback (DFB) laser array based on the reconstruction-equivalent-chirp technique. Totally sixteen DFB semiconductor lasers are densely integrated with a 4-by-4 matrix laser array. To ensure the uncooled laser operates properly, the active material of the laser chip is designed to work at high temperatures without TEC cooling. Therefore, an uncooled wavelength-tuning range of 33.8 nm is achieved during the whole commercial operating temperature range from 0 °C to 70 °C.

Published
2023
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13. Photonic Integration Circuits in China

Author

Li, Ming, primary, Chen, Xiangfei, additional, Su, Yikai, additional, Wang, Xingjun, additional, Chen, Minghua, additional, Dai, Daoxin, additional, Liu, Jianguo, additional, and Zhu, Ning Hua, additional

Published
2016
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14. Numerical Study of an Asymmetric Equivalent \lambda/4 Phase Shift Semiconductor Laser for Use in Laser Arrays.

Author

Zhou, Yating, Shi, Yuechun, Chen, Xiangfei, Li, Simin, and Li, Jingsi

Subjects
SEMICONDUCTOR lasers, QUANTUM electronics, NUMERICAL analysis, BRAGG gratings, SPECTRUM analysis
Abstract

Based on reconstruction-equivalent-chirp technology, an equivalent \lambda/4 phase shift was introduced into the center of an asymmetric sampled Bragg grating semiconductor laser that had two sections of the same lengths but different effective refractive indices. This structure could suppress the zeroth-order channel lasing effectively and enable the laser to operate in a single longitudinal mode with high stability. Such a method can also be used to fabricate a high-quality multiwavelength laser array for enhancing the yield efficiently at reduced cost. [ABSTRACT FROM AUTHOR]

Published
2011
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