Title :
Nonlinear distortion suppression in directly modulated DFB lasers by sidemode optical injection
Author :
Seo, J.-H. ; Seo, Y.-K. ; Choi, W.-Y.
Author_Institution :
Dept. of Electr. & Electron. Eng., Yonsei Univ., Seoul, South Korea
Abstract :
We demonstrate a new method of suppressing nonlinear distortions in directly modulated DFB lasers. In our scheme, external laser light is injected into the sidemode of the DFB laser. Using this scheme, we achieved significant reduction in nonlinear distortions such as the second harmonic distortion (SHD), second order intermodulation distortion (IMD2), and third order intermodulation distortion (IMD3). In addition, we enhanced the external light detuning range.
Keywords :
distributed feedback lasers; harmonic distortion; intermodulation distortion; optical modulation; optical transmitters; semiconductor lasers; SHD; directly modulated DFB lasers; external light detuning range enhancement; nonlinear distortion suppression; second harmonic distortion; second order IMD; second order intermodulation distortion; sidemode optical injection; third order IMD; third order intermodulation distortion; Fiber nonlinear optics; Injection-locked oscillators; Intermodulation distortion; Laser noise; Nonlinear distortion; Nonlinear optics; Optical distortion; Optical modulation; Optical wavelength conversion; Spectral analysis;
Conference_Titel :
Microwave Symposium Digest, 2001 IEEE MTT-S International
Conference_Location :
Phoenix, AZ, USA
Print_ISBN :
0-7803-6538-0
DOI :
10.1109/MWSYM.2001.966954
