Abstract

This paper proposes a novel optical sampling technique for monitoring ultrafast signal waveforms. The dual-channel sampling system, which employs two parallel interferometers offset by a slight relative delay, enables us to observe not only intensity but also phase (frequency) modulation without any restriction as regards signal coherence. The proposed method, based on linear interaction with local short-pulses, also allows the measurement of ultrafast signals without any electrical bandwidth limitation. The performance advantages of the proposed method are clarified through experiments, in which we successfully observe the intensity and frequency modulation of 10-Gbit/s gain-switched laser diode pulses and 160-Gbit/s optical time-division multiplexing signals, whose coherence time is much shorter than the sampling period.

© 2009 IEEE

Linear optical sampling technique for simultaneously characterizing WDM signals with a single receiving channel

Shuai Wang, Bingxin Xu, Xinyu Fan, and Zuyuan He
Opt. Express 26(2) 2089-2098 (2018)

Time division vector optical sampling for ultrafast amplitude/phase modulation device characterization

Hidemi Tsuchida
Opt. Lett. 35(19) 3183-3185 (2010)

Simultaneous WDM signal detection realized by ultrafast field sampling

Keiji Okamoto and Fumihiko Ito
Opt. Express 17(8) 6696-6702 (2009)

Requirements for the sampling source in coherent linear sampling

Inwoong Kim, Cheolhwan Kim, and Guifang Li
Opt. Express 12(12) 2723-2730 (2004)

Optical–optical double-resonance dual-comb spectroscopy with pump-intensity modulation

Akiko Nishiyama, Yoshiaki Nakajima, Ken’ichi Nakagawa, Atsushi Onae, Hiroyuki Sasada, and Kaoru Minoshima
Opt. Express 27(25) 37003-37011 (2019)