Abstract

The mode coherence of adjacent and non-adjacent spectral modes of a passively mode locked quantum dash (QDash) semiconductor laser are deduced through radio frequency beat-tone linewidth measurements. A wavelength conversion scheme that uses degenerate four wave mixing in a semiconductor optical amplifier is proposed which considerably extends the mode spacing beyond the limit imposed by conventional fast-photodetection and electrical spectrum analysis of around 100 GHz. Using this scheme, the mode coherence of the QDash laser was measured out to the thirty-first harmonic, or a mode separation of 1.5 THz.

©2012 Optical Society of America

Terahertz-bandwidth coherence measurements of a quantum dash laser in passive and active mode-locking operation

Eamonn Martin, Regan Watts, Laurent Bramerie, Alexandre Shen, Harry Gariah, Fabrice Blache, Francois Lelarge, and Liam Barry
Opt. Lett. 37(23) 4967-4969 (2012)

40 GHz mode-beating with 8 Hz linewidth and 64 fs timing jitter from a synchronized mode-locked quantum-dash laser diode

Ramón Maldonado-Basilio, Sylwester Latkowski, Severine Philippe, and Pascal Landais
Opt. Lett. 36(16) 3142-3144 (2011)

Timing-jitter, optical, and mode-beating linewidths analysis on subpicosecond optical pulses generated by a quantum-dash passively mode-locked semiconductor laser

Ramón Maldonado-Basilio, Josué Parra-Cetina, Sylwester Latkowski, and Pascal Landais
Opt. Lett. 35(8) 1184-1186 (2010)

High performance mode locking characteristics of single section quantum dash lasers

Ricardo Rosales, S. G. Murdoch, R.T. Watts, K. Merghem, Anthony Martinez, Francois Lelarge, Alain Accard, L. P. Barry, and Abderrahim Ramdane
Opt. Express 20(8) 8649-8657 (2012)

InAs/InP quantum dash buried heterostructure mode-locked laser for high capacity fiber-wireless integrated 5G new radio fronthaul systems

Khan Zeb, Zhenguo Lu, Jiaren Liu, Youxin Mao, Guocheng Liu, Philip J. Poole, Mohamed Rahim, Grzegorz Pakulski, Pedro Barrios, Weihong Jiang, and Xiupu Zhang
Opt. Express 29(11) 16164-16174 (2021)