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Browse Journals & Magazines > Applied Physics Letters ...> Volume:86 Issue:11 Help

External-cavity tunable mid-infrared laser using off-band surface-emitting Bragg grating coupler

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8 Author(s)
Zhang, H.L. ; Photonic Device and System Laboratory, Department of Electrical and Computer Engineering, University of Houston, Houston, Texas 77204-4005 ; Peng, C. ; Seetharaman, A. ; Luo, G.P.
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Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1063/1.1885188 

An external-cavity laser using an integrated two-segment design allows broad and continuous wavelength tuning with independent control of power and wavelength. The laser has a gain segment and a surface-emitting Bragg grating segment that was designed to be off-band for zero reflection inside the cavity, and with a strong free-space coupling to an external mirror to form a linear cavity. Wavelength control was achieved with a combination of coarse and broad wavelength tuning (140 nm) with the external mirror, and continuous, fine wavelength tuning via current-induced phase shift in the Bragg grating. Separate controls of the two segments allowed wavelength fine tuning without power variation and vice versa. The concept was applied to a 7 μm laser, and is applicable to other wavelength.

Published in:
Applied Physics Letters  (Volume:86 ,  Issue: 11 )

Date of Publication: Mar 2005

Page(s):
111112 - 111112-3
ISSN :
0003-6951
Digital Object Identifier :
10.1063/1.1885188
Date of Current Version :
18 June 2009
Issue Date :
Mar 2005

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