DocumentCode :
1273081
Title :
A quantum-well waveguide photodetector for high-precision wavelength monitoring about 1.55 μm
Author :
Densmore, A. ; Jessop, Paul E.
Author_Institution :
Centre for Electrophotonic Mater. & Devices, McMaster Univ., Hamilton, Ont., Canada
Volume :
11
Issue :
12
fYear :
1999
Firstpage :
1653
Lastpage :
1655
Abstract :
A two-segment InGaAsP rib waveguide photodetector is shown to function as a high resolution wavelength monitor in the 1.55-μm spectral region. For two in-line detector elements, the ratio of photocurrents produced is a sensitive function of the input wavelength near the material´s absorption edge. This ratio varies rapidly with wavelength over a range from 1.53 to 1.565 μm and is independent of the optical input power. By utilizing the quantum confined Stark effect, the operating range of the device can be extended to over 50 nm. An average wavelength sensitivity of 3 pm is demonstrated.
Keywords :
III-V semiconductors; gallium arsenide; gallium compounds; indium compounds; infrared detectors; measurement errors; monitoring; quantum confined Stark effect; rib waveguides; semiconductor quantum wells; 1.53 to 1.565 mum; 1.55 mum; InGaAsP; absorption edge; average wavelength sensitivity; high resolution wavelength monitor; high-precision wavelength monitoring; in-line detector elements; input wavelength; operating range; optical input power; photocurrents; quantum confined Stark effect; quantum-well waveguide photodetector; sensitive function; two-segment InGaAsP rib waveguide photodetector; Absorption; Detectors; Monitoring; Optical sensors; Optical waveguides; Photoconductivity; Photodetectors; Potential well; Quantum wells; Stark effect;
fLanguage :
English
Journal_Title :
Photonics Technology Letters, IEEE
Publisher :
ieee
ISSN :
1041-1135
Type :
jour
DOI :
10.1109/68.806877
Filename :
806877
Link To Document :
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