Title :
High-power high-frequency traveling-wave heterojunction phototransistors with integrated polyimide waveguide
Author :
Scott, D.C. ; Prakash, D.P. ; Erlig, H. ; Bhattacharya, D. ; Ali, M.E. ; Fetterman, H.R. ; Matloubian, M.
Author_Institution :
TRW, Redondo Beach, CA, USA
fDate :
8/1/1998 12:00:00 AM
Abstract :
A high-power high-speed phototransistor has been demonstrated using a traveling-wave (TW) structure with an integrated polyimide optical waveguide. In our configuration, optical power transfer is distributed along the length of the device via leaky mode coupling of light from the polyimide waveguide to the active region of the phototransistor. The TW electrode design allows for an electrically long structure while maintaining high bandwidths. Due to the increased absorption volume, the optical power handling capabilities of the TW-heterojunction phototransistors (TW-HPT´s) are improved over that of conventional lumped-element HPT detectors. The experimental results show no saturation of the fundamental at 60 GHz up to 50 mA of DC photocurrent
Keywords :
integrated optoelectronics; optical polymers; optical receivers; optical waveguides; photodetectors; phototransistors; 50 mA; 60 GHz; electrically long structure; high-frequency phototransistors; high-power phototransistors; high-speed phototransistor; integrated polyimide waveguide; leaky mode coupling; microwave fibre optic links; optical power handling capabilities; optical power transfer; polyimide optical waveguide; traveling-wave electrode structure; traveling-wave heterojunction phototransistors; Electrodes; Heterojunctions; High speed optical techniques; Integrated optics; Optical coupling; Optical devices; Optical saturation; Optical waveguides; Phototransistors; Polyimides;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
