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Proceedings Paper

1.25-Gb/s LED-based optical transmitter
Author(s): Warren A. Rosen; Warren N. Herman; Afshin S. Daryoush; T. Daniel
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Paper Abstract

An optical transmitter is described which uses a commercial LED coupled to an external modulator to achieve a 1.25 Gb/s data rate. Both a Mach-Zehnder modulator and a reverse ?? directional coupler were evaluated for modulation of the optical signal. Analytical expressions are derived for the extinction ratio in each device as a function of spectral width of the source. Experimentally, both devices produced an extinction ratio > 20 dB with peak output powers of —20.1 and —23.9 dBm respectively. We estimate that by minimising losses in the system, peak output powers of —12.5 and —15.1 dBm respectively can be achieved with the two devices using the available LED. We also discuss design improvements which can reduce the wavelength sensitivity of the ?? switch and describe a drive circuit capable of extending the upper frequency limit of the current switch from 200 to 1250 MHz.

Paper Details

Date Published: 1 February 1992
PDF: 11 pages
Proc. SPIE 1580, Fiber Optic Components and Reliability, (1 February 1992); doi: 10.1117/12.135389
Show Author Affiliations
Warren A. Rosen, Naval Air Development Ctr. (United States)
Warren N. Herman, Naval Air Development Ctr. (United States)
Afshin S. Daryoush, Drexel Univ. (United States)
T. Daniel, Drexel Univ. (United States)

Published in SPIE Proceedings Vol. 1580:
Fiber Optic Components and Reliability
Paul M. Kopera; Dilip K. Paul, Editor(s)

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