Generation of Millimeter Waves by Photomixing at 1.55 m Using InGaAs–InAlAs–InP Velocity-Matched Distributed Photodetectors

Abstract—Millimeter-wave generation by photomixing at 1.55 m in long-wavelength velocity-matched distributed pho-todetector (VMDP) is experimentally demonstrated. The VMDP exhibits a dc responsivity of 0.25 A/W, a breakdown voltage of 7–9 V, and up to 15-mA dc photocurrent without damage. Millimeter-wave output powers of 21 dBm at 75 GHz and 24 dBm at 95 GHz were measured. Index Terms—Distributed photodetector, high-speed, InAlAs, InGaAs, InP, millimeter-wave generation, MSM photodetector