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Proceedings Paper

Generation of picosecond pulses and optical frequency combs with multi-section 1065nm ridge waveguide diode lasers
Author(s): A. Klehr; S. Schwertfeger; A. Liero; Th. Hoffmann; J. Fricke; H. Wenzel; G. Erbert; G. Tränkle
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Paper Abstract

Mode-locked diode lasers generate reliably picosecond or even sub-picosecond optical pulses. Especially, colliding pulse mode-locked (CPM) lasers are promising sources for the generation of short optical pulses with a high repetition frequency. We present experimental results for the generation of ps optical pulses with multi-section ridge waveguide CPM lasers. The lasers with a central emission wavelength of 1065nm consist of an odd number of 100μm long electrically separated sections. CPM operation is achieved by reverse DC biasing the central section which acts as a saturable absorber and forward DC biasing the other (gain) sections. For a cavity length of 1.9mm, passive mode-locking is achieved for a reverse bias of -2.0V applied to the saturable absorber. The repetition frequency is about 43GHz and the pulse length is 3.3ps assuming a sech-pulse shape. The frequency comb spans 6nm assuming a dynamical range of 20dB with a frequency spacing of about 21GHz. At a cavity length of 0.9mm a frequency comb with more than 175 single frequencies over 12nm with a spacing of 45GHz is obtained. Detailed investigations of the optical pulse and frequency comb generation in dependence on cavity length, reverse absorber voltage and DC bias current will be presented.

Paper Details

Date Published: 9 February 2012
PDF: 10 pages
Proc. SPIE 8277, Novel In-Plane Semiconductor Lasers XI, 82770E (9 February 2012); doi: 10.1117/12.905745
Show Author Affiliations
A. Klehr, Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik (Germany)
S. Schwertfeger, Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik (Germany)
A. Liero, Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik (Germany)
Th. Hoffmann, Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik (Germany)
J. Fricke, Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik (Germany)
H. Wenzel, Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik (Germany)
G. Erbert, Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik (Germany)
G. Tränkle, Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik (Germany)


Published in SPIE Proceedings Vol. 8277:
Novel In-Plane Semiconductor Lasers XI
Alexey A. Belyanin; Peter M. Smowton, Editor(s)

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