title: Balanced detection technique to measure small changes in transmission.
abstract: A novel technique to measure changes in optical transmission of better than 10(-3) with time resolution of better than 10 ns is discussed. The photocurrent from two photodiodes is subtracted with a balanced detection circuit to eliminate the common signal; carrier-induced change in absorption for a semiconductor single quantum well produces a large differential signal.
authors.forename: G D
authors.initials: GD
authors.lastname: Houser
authors.forename: E
authors.initials: E
authors.lastname: Garmire