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High-Reliability Pump Module for Non-Planar Ring Oscillator LaserWe propose and have demonstrated a prototype high-reliability pump module for pumping a Non-Planar Ring Oscillator (NPRO) laser suitable for space missions. The pump module consists of multiple fiber-coupled single-mode laser diodes and a fiber array micro-lens array based fiber combiner. The reported Single-Mode laser diode combiner laser pump module (LPM) provides a higher normalized brightness at the combined beam than multimode laser diode based LPMs. A higher brightness from the pump source is essential for efficient NPRO laser pumping and leads to higher reliability because higher efficiency requires a lower operating power for the laser diodes, which in turn increases the reliability and lifetime of the laser diodes. Single-mode laser diodes with Fiber Bragg Grating (FBG) stabilized wavelength permit the pump module to be operated without a thermal electric cooler (TEC) and this further improves the overall reliability of the pump module. The single-mode laser diode LPM is scalable in terms of the number of pump diodes and is capable of combining hundreds of fiber-coupled laser diodes. In the proof-of-concept demonstration, an e-beam written diffractive micro lens array, a custom fiber array, commercial 808nm single mode laser diodes, and a custom NPRO laser head are used. The reliability of the proposed LPM is discussed.
Document ID
20110016065
Acquisition Source
Jet Propulsion Laboratory
Document Type
Conference Paper
External Source(s)
Authors
Liu, Duncan T.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Qiu, Yueming
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Wilson, Daniel W.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Dubovitsky, Serge
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Forouhar, Siamak
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 25, 2013
Publication Date
August 26, 2007
Subject Category
Lasers And Masers
Meeting Information
Meeting: 2007 SPIE International Symposium on Optics and Photonics
Location: San Diego, CA
Country: United States
Start Date: August 26, 2007
End Date: August 30, 2007
Sponsors: International Society for Optical Engineering
Distribution Limits
Public
Copyright
Other
Keywords
micro lens array
Non-Planar Ring Oscillator (NPRO) laser
reliability
laser diode pump module
optical fiber array

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