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Optical Engineering

Design and characteristics of a tapered amplifier diode system by seeding with continuous-wave and mode-locked external cavity diode laser
Author(s): Yihan Xiong; Sytil Murphy; John L. Carlsten; Kevin S. Repasky
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Paper Abstract

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, 240 mW is achieved after the TA, 115 mW (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, 39 mW (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.

Paper Details

Date Published: 1 December 2006
PDF: 5 pages
Opt. Eng. 45(12) 124205 doi: 10.1117/1.2404925
Published in: Optical Engineering Volume 45, Issue 12
Show Author Affiliations
Yihan Xiong, Montana State Univ./Bozeman (United States)
Sytil Murphy, Montana State Univ./Bozeman (United States)
John L. Carlsten, Montana State Univ./Bozeman (United States)
Kevin S. Repasky, Montana State Univ./Bozeman (United States)

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