Title :
Demonstration of a fibre-optic tapped delay line spectrometer
Author :
Ranalli, E. ; Lee, H.P.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Irvine, CA, USA
fDate :
5/1/1994 12:00:00 AM
Abstract :
A method for obtaining power spectral estimates for narrow-band (<100 MHz) optical signals is reported, based on measurements of the far-field intensity profiles resulting from diffraction of the output of a fiber optic tapped delay line array. The device exhibits a resolving power exceeding 10/sup 7/, as well as an angular dispersion of 0.4/spl deg//GHz, representing an improvement of at least three orders of magnitude over conventional diffraction gratings.<>
Keywords :
diffraction gratings; fibre optic sensors; optical resolving power; spectrometers; visible spectroscopy; 6328 A; angular dispersion; diffraction gratings; far-field intensity profiles; fiber optic tapped delay line array; fibre-optic tapped delay line spectrometer; narrow-band optical signals; output diffraction; power spectral estimates; resolving power; Delay estimation; Delay lines; Narrowband; Optical arrays; Optical diffraction; Optical fiber devices; Optical fibers; Power measurement; Signal resolution; Spectroscopy;
Journal_Title :
Photonics Technology Letters, IEEE
