Title :
Two photon absorption InGaAsP waveguide autocorrelator for pulsewidth measurement of low power 1.55 μm wavelength pulses
Author :
Chan, L.Y. ; Tsang, H.K.
Author_Institution :
Dept. of Electron. Eng., Chinese Univ. of Hong Kong, Shatin, Hong Kong
Abstract :
We have demonstrated a high sensitivity autocorrelator by using two photon absorption (TPA) in InGaAsP rib waveguides. The TPA autocorrelation technique can measure low power picosecond pulses with peak power less than 29 mW (average power as low as 17.9 μW with repetition rate 6 MHz). Since TPA is an ultrafast nonlinear process, and the optical path length of the delay line can be controlled to within a micron, the method can in principle allow femtosecond time resolution
Keywords :
III-V semiconductors; gallium arsenide; high-speed optical techniques; indium compounds; optical correlation; optical waveguides; rib waveguides; two-photon processes; 1.55 micron; 17.9 muW; 29 mW; 6 MHz; InGaAsP; InGaAsP rib waveguide; autocorrelation; delay line; femtosecond time resolution; low power picosecond pulses; optical path length; pulsewidth measurement; two photon absorption; ultrafast nonlinear process; Absorption; Autocorrelation; Delay lines; Nonlinear optics; Optical pulses; Optical sensors; Optical waveguides; Power measurement; Pulse measurements; Ultrafast optics;
Conference_Titel :
Electron Devices Meeting, 1995., Proceedings 1995 IEEE Hong Kong
Print_ISBN :
0-7803-2919-8
DOI :
10.1109/HKEDM.1995.520643
