Lasers and Laser Optics

Design and characteristics of a tapered amplifier diode system by seeding with continuous-wave and mode-locked external cavity diode laser

[+] Author Affiliations
Yihan Xiong

Montana State University, Physics Department, EPS 264, Bozeman, Montana 59717

Sytil Murphy

Montana State University, Physics Department, EPS 264, Bozeman, Montana 59717

J. L. Carlsten

Montana State University, Physics Department, EPS 264, Bozeman, Montana 59717

Kevin Repasky

Montana State University, ECE Department, Cobleigh 610, Bozeman, Montana 59717

Opt. Eng. 45(12), 124205 (December 21, 2006). doi:10.1117/1.2404925
History: Received February 24, 2006; Revised May 03, 2006; Accepted May 08, 2006; Published December 21, 2006
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We present a detailed design of a simple, stable, and compact tapered amplifier (TA) diode system. Heat conductivity, strain release, and system alignment are taken into consideration for this design. Convenient access to the three-dimensional adjustments for collimation makes the system easy to align. The optical amplification is discussed as a function of injection of current and operating temperature for both a continuous-wave external cavity diode laser (CW-ECDL) and a mode-locked external cavity diode laser (ML-ECDL). With 5-mW CW-ECDL seeding power, 240mW is achieved after the TA, 115mW (48%) of which can be coupled into a single-mode fiber. With 0.75-mW average ML-ECDL seeding power, 80-mW average power, or about 11-W peak power (843-MHz repetition rate and 8-ps pulse width), is achieved after the TA, 39mW (49%) of which can be coupled into a single-mode fiber. In both cases, the amplified light maintains the optical properties of the seeding light, showing the same mode suppression. The output power spatial mode quality is characterized with a camera and BeamView software. Output power stability is also discussed.

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© 2006 Society of Photo-Optical Instrumentation Engineers

Citation

Yihan Xiong ; Sytil Murphy ; J. L. Carlsten and Kevin Repasky
"Design and characteristics of a tapered amplifier diode system by seeding with continuous-wave and mode-locked external cavity diode laser", Opt. Eng. 45(12), 124205 (December 21, 2006). ; http://dx.doi.org/10.1117/1.2404925


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