Title :
Tunable narrowband optical filter in photorefractive InGaAsP:Fe/InP:Fe singlemode waveguide
Author :
Hervé, D. ; Viallet, J.E. ; Salaun, S. ; Le Corre, A. ; Delorme, F. ; Mainguet, B.
Author_Institution :
Dept. Micro-Ondes, Telecom Bretagne, Brest, France
Abstract :
Recently a new compact WDM spectrum analyser without moving parts was demonstrated using a bulk photorefractive InP:Fe crystal. With the aim of reducing the sweeping time by confining optical energy, a first optically tunable filter on a photorefractive singlemode waveguide was realized on an InP:Fe substrate. The device operates at the 1.55 μm wavelength and the tuning range is given by the tunable laser diode used for the control of the Bragg grating period. The bandwidth is 0.02 nm (2.5 GHz) and the intrinsic reflectivity is 2%
Keywords :
III-V semiconductors; gallium arsenide; indium compounds; iron; optical waveguide filters; photorefractive materials; 1.55 micron; 2.5 GHz; Bragg grating; InGaAsP:Fe-InP:Fe; WDM spectrum analyser; optical energy confinement; photorefractive single-mode waveguide; reflectivity; sweeping time; tunable narrowband optical filter; Diode lasers; Laser tuning; Narrowband; Optical filters; Optical tuning; Optical waveguides; Photorefractive effect; Photorefractive materials; Tunable circuits and devices; Wavelength division multiplexing;
Conference_Titel :
Indium Phosphide and Related Materials, 1997., International Conference on
Conference_Location :
Cape Cod, MA
Print_ISBN :
0-7803-3898-7
DOI :
10.1109/ICIPRM.1997.600042
