Title :
Highly sensitive and compact cross-correlator for measurement of picosecond pulse transmission characteristics at 1550 nm using two-photon absorption in Si avalanche photodiode
Author :
Kikuchi, K. ; Futami, F. ; Katoh, K.
Author_Institution :
Res. Center for Adv. Sci. & Technol., Tokyo Univ., Japan
fDate :
10/29/1998 12:00:00 AM
Abstract :
A highly sensitive and compact cross-correlator in which an Si avalanche photodiode (APD) is used as a two-photon absorber is described, which was developed for the measurement of picosecond pulse transmission characteristics at 1550 nm. A 10 GHz, 1.7 ps pulse under test is generated from an external-cavity modelocked semiconductor laser, and is transmitted through an 80 km long dispersion-shifted fibre. A 200 fs sampling pulse is obtained from the pulse under test by pulse compression. An Si APD is used as a two-photon absorber for the cross-correlation measurement of the transmitted pulse waveform. The asymmetric pulse-waveform distortion stemming from the dispersion slope is clearly detected by the system
Keywords :
avalanche photodiodes; elemental semiconductors; high-speed optical techniques; optical correlation; silicon; two-photon processes; 1.7 ps; 10 GHz; 1550 nm; 200 fs; 80 km; Si; Si avalanche photodiode; cross-correlator; dispersion-shifted fibre; external-cavity mode-locked semiconductor laser; picosecond pulse transmission measurement; two-photon absorption;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19981522
