Homodyne detection of multimode optical signals

Date

1991

Editor(s)

Advisor

Şaplakoğlu, Gürhan

Supervisor

Co-Advisor

Co-Supervisor

Instructor

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Abstract

The feasibility of coherent hoinodyne detection for multimode optical sources is experimentally investigated. By employing the self-homodyne detection, it is observed that a considerable amount of mixing can take place between the signal and local oscillator fields despite the relatively small coherence length of multimode lasers. The experiment was carried out using an a.ll-a.tmosplieric set-up, uecessitating a thorough calculation of power losses due to beam misahgnment. Power losses in the interference term for radial and angular misalignments were calculated for first order Gaussian beams. It is seen that radial misalignment is intolerable lor beam radii ratios smaller than 0.35 whereas angular misalignment becomes intolerable for angular deviations greater than a few tens of milli degrees.

Source Title

Publisher

Course

Other identifiers

Book Title

Degree Discipline

Electrical and Electronic Engineering

Degree Level

Master's

Degree Name

MS (Master of Science)

Citation

Published Version (Please cite this version)

Language

English

Type