Enhanced Modulation Bandwidth of a Fabry-PÉrot Semiconductor Laser Subject to Light Injection From Another Fabry-PÉrot Laser

• Published in: IEEE journal of quantum electronics Vol. 44; no. 6; pp. 528 - 535
• Main Authors: Zhu, Ning Hua, Li, Wei, Wen, Ji Mim, Han, Wei, Chen, Wei, Xie, Liang
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.06.2008; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Bandwidth; Direct modulation; Distributed feedback devices; Fabry-PÉrot (FP) laser; frequency response; Laser mode locking; Laser modes; Nonlinear optics; Optical feedback; optical injection; Optical modulation; scattering parameter; Semiconductor lasers; Surface emitting lasers; Vertical cavity surface emitting lasers
• ISSN: 0018-9197; 1558-1713
• DOI: 10.1109/JQE.2008.917961

Variations in optical spectrum and modulation bandwidth of a modulated Fabry-Perot (FP) semiconductor laser subject to the external light injection from another FP Laser is investigated in this paper. Optimal wavelength matching conditions for two FP lasers are discussed. A series of experiments show that two FP lasers should have a central wavelength overlapping and a mode spacing difference of several gigahertz. Under these conditions both the magnitude and phase frequency responses can be improved significantly.