The study of the polarization properties of the large-mode-area fiber amplifier applied in coherent combination

✍ Scribed by Zhancheng Guo; Shenggui Fu; Yange Liu; Xiujie Jia; Libin Si; YanLi Jin; Shuzhong Yuan; Xiaoyi Dong

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 225 KB
• Volume: 49
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/mop.22178

✦ Synopsis

Abstract

Based on the maser oscillator power amplifier configuration including a single mode erbium‐doped fiber laser used as the signal source and a large‐mode‐area Erbium/Ytterbium double‐clad fiber used as the gain medium, the polarization states of the signal light and the amplified signal light were experimentally investigated. The results showed that the degree of polarization of the output of the amplifier was low without taking any polarization control measure; after inserting a polarizer in the loop of the signal source, the degree of polarization was improved evidently and the stability of the polarization state became better, whether for continuous wave operation or for mode‐locked operation. The mode‐locked operation had a little lower degree of polarization and a better Polarization state (PS's) stability than the CW operation of the output of the amplifier. So, a combination use of a polarizer and a polarization controller could improve the polarization degree and adjust the polarization state of the amplified signal light. This work offered an important experimental basis for the control of the PS in the laser beam coherent combination. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 516–518, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22178