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July 1, 2001 / Vol. 26, No. 13 / OPTICS LETTERS 989 Waveguide grating mirror for large-area semiconductor lasers
 

Summary: July 1, 2001 / Vol. 26, No. 13 / OPTICS LETTERS 989
Waveguide grating mirror for large-area semiconductor lasers
Ivan Avrutsky and Rabi Rabady
Department of Electrical and Computer Engineering, Wayne State University, Detroit, Michigan 48202
Received February 13, 2001
We have fabricated and tested a waveguide grating mirror that uses anomalous reflection of light associ-
ated with excitation of waveguide modes. Sharp features are observed in the ref lection spectra in both the
wavelength and the angular domains. We confirm experimentally that, when the waveguide grating mirror
is placed a short distance in front of a large-area semiconductor laser, it can control the emission spectrum.
This demonstration opens a new approach to the design of very compact semiconductor lasers operating in
the single-frequency ­single-mode regime. © 2001 Optical Society of America
OCIS codes: 050.0050, 050.1950, 140.0140, 140.3410.
Light ref lection from a surface of a periodically
corrugated planar waveguide reveals sharp features
similar to Wood anomalies of metal gratings.1
In
contrast with a metal surface, a dielectric waveguide
can maintain modes of both TE and TM polarization,
so the anomalies exist for any polarization of input
light. Anomalous reflection in the case of a lossless

  

Source: Avrutsky, Ivan - Department of Electrical and Computer Engineering, Wayne State University

 

Collections: Engineering