Title :
First tunable narrowband 1.55 μm optical drop filter using a dynamic photorefractive grating in iron doped indium phosphide
Author :
Herve, D. ; Chauvet, M. ; Viallet, J.E. ; Chawki, M.J.
Author_Institution :
France Telecom, Ecole Nat. Superieure des Telecommun. de Bretagne, Brest
fDate :
10/27/1994 12:00:00 AM
Abstract :
A tunable narrowband (FWHM=2.5 GHz) 1.55 μm reflective drop filter is realised in an iron doped indium phosphide crystal. The index grating results from the photorefractive effect via an interference pattern. The grating period is determined by the wavelength of the laser diode which provides the two counter-propagating writing beams
Keywords :
III-V semiconductors; diffraction gratings; electro-optical devices; indium compounds; iron; light interference; optical filters; photorefractive effect; semiconductor lasers; 1.55 mum; InP:Fe; counter-propagating writing beams; dynamic photorefractive grating; index grating; interference pattern; laser diode; optical drop filter; photorefractive effect; tunable narrowband filter;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19941244
