Extending bandwidth of optical emitters using active matching te

Details Extending bandwidth of optical emitters using active matching te Extending bandwidth of optical emitters using active matching te

1991-09-13

1993-05-25

Coles, Sr., Edward L.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359173, 372 38, 250214A, H04B 1004

Patent

active

052145255

ABSTRACT:
An optical transmitter particularly suited for high frequency applications s disclosed. The optical transmitter successfully operates in harsh environments such as those found in avionic applications. The optical transmitter employs an LED as a light source which cooperates with an active bandpass amplifier to provide a relatively wide bandwidth from about 250 MHz to about at least 1.35 GHz. The bandpass amplifier is selected to have a slope characteristic which is complementary to a roll-off characteristic of the LED and compensates for the high frequency loss of the LED. The slope characteristic of the bandpass amplifier predominates at the high frequencies of the response of the optical transmitter, whereas the frequency response of the LED dominates at the lower frequencies of the response.

REFERENCES:
patent: 4748634 (1988-05-01), Hesterman
patent: 4945542 (1990-07-01), Brothers, Jr.
patent: 4984292 (1991-01-01), Millen

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