Optical heterodyne interference laser based on MOPA structure

Dong Lei; Liu Xinyue; Zhang Jingxu; Yu Shuhai; Wang Guocong

In order to satisfy the requirement of laser interference imaging, especially Fourier telescope imaging, to generate frequency-stably high-power optical heterodyne interference mode, the concept of optical heterodyne interference laser based on the structure of MOPA was put forward and was proved by experiment. The limits of conventional method of generating optical heterodyne interference mode were pointed out and the main merits of optical heterodyne interference laser based on the structure of MOPA were presented. The possible limits of obvious effects on interference and inducing optical excursion were pointed out and were proved by experiment. The conclusion is given that the process of power amplification has no effect on interference and the line width is less than 0.1GHz by single amplification(based on real measurement of coherent length, the line width is about 30 MHz),and also that the processes of power amplification and frequency doubling has no effects on optical excursion and it is deduced that the real measurement of frequency excursion less that 10 Hz coinciding with frequency stability of AO frequency shifter was only related with frequency shifter.

1. Changchun Institute of Optics,Fine machines and Physics,Chinese Academy of Science,Changchun 130033,China

Received Date: 2013-06-10

Rev Recd Date: 2013-07-25

Publish Date: 2014-02-25

Key words:

Abstract: In order to satisfy the requirement of laser interference imaging, especially Fourier telescope imaging, to generate frequency-stably high-power optical heterodyne interference mode, the concept of optical heterodyne interference laser based on the structure of MOPA was put forward and was proved by experiment. The limits of conventional method of generating optical heterodyne interference mode were pointed out and the main merits of optical heterodyne interference laser based on the structure of MOPA were presented. The possible limits of obvious effects on interference and inducing optical excursion were pointed out and were proved by experiment. The conclusion is given that the process of power amplification has no effect on interference and the line width is less than 0.1GHz by single amplification(based on real measurement of coherent length, the line width is about 30 MHz),and also that the processes of power amplification and frequency doubling has no effects on optical excursion and it is deduced that the real measurement of frequency excursion less that 10 Hz coinciding with frequency stability of AO frequency shifter was only related with frequency shifter.

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Optical heterodyne interference laser based on MOPA structure

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