Accession Number : ADD015875

Title :   Extending Bandwidth of Optical Emitters Using Active Matching Technique.

Descriptive Note : Patent, Filed 13 Sep 91, patented 25 May 93,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Gershman, Vladimir ; Daryoush, Afshin S ; Rosen, Warren A

Report Date : 25 May 1993

Pagination or Media Count : 14

Abstract : An optical transmitter particularly suited for high frequency applications is 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.

Descriptors :   *BANDPASS AMPLIFIERS, *PATENTS, *LIGHT EMITTING DIODES, *ELECTROOPTICS, AMPLIFIERS, AVIONICS, BANDWIDTH, FREQUENCY, FREQUENCY RESPONSE, HIGH FREQUENCY, LIGHT SOURCES, ROLL, SLOPE, TRANSMITTERS, EMITTERS, GAIN

Subject Categories : Electrooptical and Optoelectronic Devices
      Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE