Title :
High speed velocity-matched distributed photodetectors
Author :
Chau, T. ; Kaneda, N. ; Jung, T. ; Rollinger, A. ; Mathai, S. ; Qian, Y. ; Itoh, T. ; Wu, M.C. ; Shillue, B. ; Payne, J. ; Emerson, D.
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
Abstract :
We report work on long-wavelength (1.55 μm) velocity-matched distributed photodetectors (VMDP) for RF photonic systems and millimeter-wave photomixers. The VMDP consists of an array of photodiodes connected by an optical waveguide. The output is collected in phase by the velocity-matched 50 Ω microwave transmission line. The VMDP offers many advantages for high frequency photodetectors with high saturation power. The distributed absorption is also desirable for increasing the damage threshold due to thermal runaway. Recently, we have experimentally demonstrated millimeter-wave generation at 95 GHz using a 1.55 μm VMDP. We review the state of the art of high-speed photodetectors, and present recent results in VMDP development for millimeter-wave generation
Keywords :
high-speed optical techniques; integrated optics; microwave photonics; millimetre wave generation; optical arrays; photodetectors; 1.55 mum; 95 GHz; InP; InP substrate; RF photonic systems; damage threshold; distributed absorption; high frequency photodetectors; high saturation power; high speed velocity-matched distributed photodetectors; millimeter-wave generation; millimeter-wave photomixers; optical waveguide; photodiode array; thermal runaway; velocity-matched microwave transmission line; Electromagnetic wave absorption; High power microwave generation; High speed optical techniques; Optical arrays; Optical saturation; Optical waveguides; Photodetectors; Photodiodes; Power transmission lines; Radio frequency;
Conference_Titel :
LEOS '99. IEEE Lasers and Electro-Optics Society 1999 12th Annual Meeting
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-5634-9
DOI :
10.1109/LEOS.1999.811993
