Note: Design of a laser feedback interferometer with double diffraction system

Journal Article · Tue Sep 15 04:00:00 EDT 2015 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4931781· OSTI ID:22482804

Guo, Dongmei; Wang, Ming ^[1]

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1. Jiangsu Key Laboratory on Opto-Electronic Technology, School of Physical Science and Technology, Nanjing Normal University, Nanjing 210023 (China)

A novel laser feedback interferometer with double diffraction system is proposed in this paper. A beam emitted from the laser is incident onto a transmission grating. The mth order beam is vertically reflected by a mirror and diffracted again by the grating. The double-diffracted beam returns into the laser cavity and mixes with the light inside the active cavity, thus generating a modulation of both the amplitude and the frequency of the lasing field. Theoretical analysis and experimental observations show that the output signal of the proposed system depends on the grating pitch and the direction of the phase movement can be obtained from inclination of the interference signal. It provides a potential displacement sensor with high stability and quite a compact configuration.

• OSTI ID: 22482804
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 9 Vol. 86; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
BEAMS
DIFFRACTION
DIFFRACTION GRATINGS
FEEDBACK
INTERFEROMETERS
LASER CAVITIES
LASERS
SIGNALS