[OPTICAL REVIEW Vol. 6, No. 4 (1999) 355-358]

Timing Jitter in Amplitude Modulated Harmonically Mode-Locked Er-Doped Fiber Ring Lasers

Adi RAHWANTO,1 Yoshiro MATSUO,1 Norihiko NISHIZAWA,1,* Toshio GOTO,1 Masakazu MORI2 and Kazuo YAMANE3

1Department of Quantum Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603 Japan, 2Department of Information Network Engineering, Aichi Institute of Technology, 1247, Yachigusa, Yagusa-cho, Toyota, 470-0392 Japan, 3Lightwave Transmission Engineering Department, Fujitsu Ltd., 4-1-1, Kamikotanaka, Nakahara-ku, Kawasaki, 211-8588 Japan

(Recived December 12, 1998, Accepted February 25, 1999)

The phase noise and the amplitude noise of optical pulses from the amplitude modulated harmonically mode-locked (AM-HML) Er-doped fiber (EDF) ring laser was investigated by measuring the power spectra of the optical pulses. The root mean square (RMS) timing jitter and the RMS amplitude noise are 1.26 ps and 2.5% (500 Hz-50 kHz), respectively, when the pulse repetition frequency is 1.58 GHz. They are smaller than those in conventional harmonically mode-locked EDF ring lasers.

Key words : phase noise, timing jitter, amplitude noise, fiber ring lasers, mode-locked lasers, active mode-locking, short pulse lasers