Broadband InGaAs tapered diode laser sources for optical coherence radar and coherence tomography

Casel, Oliver; Fuchs, Harry; Tremont, Marc A.; Woll, Dirk; Wallenstein, Richard
May 2005
Applied Physics Letters;5/9/2005, Vol. 86 Issue 19, p191101
Academic Journal
This letter reports on broadband laser sources based on InGaAs tapered diode laser amplifiers with external optical feedback. The generated 920 nm radiation with a bandwidth of up to 20 nm and a power of a few hundred milliwatts is emitted in an almost diffraction limited beam. Spectral filtering and subsequent amplification in a second tapered amplifier provides radiation with spectral widths in the range of 20 to 40 nm and optical output powers of up to 2.5 W.


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