NARROW-LINEWIDTH, TUNABLE DISTRIBUTED-FEEDBACK PHOTODETECTOR

We demonstrate a photodetector with a narrow spectral linewidth (appro ximately 2 Angstrom) and a useful electrical-tuning range of 35 Angstr om. The photodetector features a horizontal resonant cavity in which f eedback is achieved using distributed feedback reflectors. The optical and electrical paths in this photodetector are orthogonal. Consequent ly, this normal incidence horizontal resonant cavity photodetector is completely integrable into wavelength division demultiplexing and othe r optoelectronic integrated circuits with a potential for high speed o peration. (C) 1996 American Institute of Physics.