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Zhuo Chen - IEEE Xplore Author Profile

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Ultrafast laser that directly emits vortex beam has broad application prospects in many research fields and applications, such as telecommunication, bio-sampling and quantum information science. In this article, we demonstrate a wavelength-tunable and OAM-switchable ultrafast fiber laser enabled by intracavity polarization controlling elements. The mode-locked laser can emit vortex beam outputs wi...Show More
An ultrafast wavelength-swept distributed feedback (DFB) semiconductor laser based on the reconstruction-equivalent-chirp (REC) technique via instantaneous injection current modulation is demonstrated. The REC technique can simplify the DFB fabrication process and maintain good single-mode operation. The driving circuit equipped with FPGA can generate a precise pulse current by controlling the n-m...Show More
We propose and demonstrate an instantaneous- wavelength-variation monitoring system for the wavelength- swept distributed feedback (DFB) laser, which consists of the wavelength-swept DFB laser, an unbalanced Mach-Zehnder interferometer (MZI), a 3-port optical circulator and a fiber Bragg grating (FBG). The unbalanced MZI contains two arms with different delay lengths to generate a beat signal when...Show More
A wide-band fast-sweeping tunable laser array has been designed and fabricated. Sixteen lasers are densely integrated with a 4-by-4 matrix laser array. The wavelength of each channel in the array deviates from the design wavelength by within ±0.2 nm, owing to the high wavelength control accuracy of the reconstruction-equivalent-chirp (REC) technique. By periodically on-off switching and current-sw...Show More
In this study, a tunable in-series multi-wavelength distributed feedback laser array (DFB-MLA) based on reconstruction-equivalent-chirp (REC) technique with simple wavelength tuning scheme is presented and experimentally demonstrated. Unlike traditional DFB laser tuned by thermal-electric cooler (TEC), the proposed laser tuned by injection current can realize faster wavelength-tuning and reduce TE...Show More
A novel method based on deep learning technique for the modal decomposition of the optical fields emerging from the few-mode fiber is demonstrated in this paper. By combining the advantages of principal component analysis (PCA) and Back-Propagation (BP) neural network, this scheme can reveal the exact superposition of eigenmodes. Firstly, PCA algorithm is applied to preprocess the target samples t...Show More