Sponsor(s): Chinese Optical Society；Shanghai Institute of Optics and Fine Mechanics，Chinese Academy of Sciences
12 issues per year
Current Issue: Issue 03, 2020
Acta Optica Sinica(ISSN：0253-2239), founded in 1981, is the optical academic publication issued at home and abroad, which covers the latest research in optical science. The main scopes of this journal include atmospheric and ocean optics, detectors, fiber optics and optical communications, Fourier optics and optical signal processing, holography, imaging systems, measurement and metrology, lasers and laser optics, machine vision, materials, nonlinear optics, optical design and fabrication, optical devices, physical optics, quantum optics, remote sensing and sensors, spectroscopy, X-ray optics, etc. This journal offers service for optical science and technology researcher to carry out academic exchange and discussion. Acta Optica Sinica has been selected into Science Abstracts(SA), Chemical Abstract (CA), Abstract Journal(AJ), Information Service in Physics, Electro-Technology, Computer and Control (INSPEC), Engineering Index (EI), etc, which is one of 100 outstanding academic journals of China.
Gan Fuxi Wang Zhijiang Xu Zhizhan Wang Runwen
Shao Jianda Xu Jinjun Hu Lili Han Shensheng
Executive Editorial Board
Wang Yongtian Liu Shu
Acta Optica Sinica,2020,Vol 40,No. 03
Using the split-step Fourier method to solve the steady-state traveling wave equation of a tapered semiconductor laser amplifier, we analyzed the optical and thermal characteristics of two kinds of laser amplifiers (with linear and nonlinear flare structures) by numerical simulation. By comparing the input current–output power curve, input power–output power curve, and the number of filaments of the two laser amplifiers, we studied the formation mechanism of filaments in the amplifiers, and the reason of the different optical field distributions in the two laser amplifiers was explained. Results show that the nonlinear flare structure can not only make the gain distribution more consistent with the optical field distribution but also reduce the coupling between the reflected light and incident light at the edge of the waveguide. Furthermore, the tapered laser amplifier with the nonlinear flare structure has the higher optical–optical conversion efficiency and more stable mode output.