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

fYear

1995

fDate

34881

Firstpage

47

Lastpage

50

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Electron Devices Meeting, 1995., Proceedings 1995 IEEE Hong Kong

Print_ISBN

0-7803-2919-8

Type

conf

DOI

10.1109/HKEDM.1995.520643

Filename

520643