Abstract

In a wavelength-division-multiplexed broadband fiber-optic network, a key component is a narrowband filter with good bandwidth control and a wide tunability of the center frequency. We have previously demonstrated such a device, the tunable resonant amplifying photodetector (TRAP) which can function simultaneously as a tunable filter, optical amplifier, photodetector, and FSK discriminator.¹ In this paper, we present a theoretical model for this multifunction device. This theory is applicable to all types of resonant laser diode amplifiers, i.e., DFB, DBR, and Fabry-Perot.

© 1990 Optical Society of America