We report what is to our knowledge the first demonstration of terahertz-rate optical pulse generation by harmonic passive mode locking in a distributed-Bragg-reflector laser diode. Along with the fundamental repetition rate of 38.8 GHz, we observed 400-GHz, 800-GHz, and 1.54-THz harmonics, depending on the bias condition of gain section. The pulse envelope for 1.54-THz pulses was in good agreement with a calculation from the Fourier transformation of the optical spectrum, indicating that the output pulses are transform limited.
© 1994 Optical Society of America
Original Manuscript: January 3, 1993
Published: June 1, 1994
Shin Arahira, Saeko Oshiba, Yasuhiro Matsui, Tatsuo Kunii, and Yoh Ogawa, "Terahertz-rate optical pulse generation from a passively mode-locked semiconductor laser diode," Opt. Lett. 19, 834-836 (1994)