Linewidth Enhancement Factor Measurement of a Fabry Perot Laser Diode through Narrowband Optical FM Generation
-
Taraprasad Chattopadhyay
,
Prosenjit Bhattacharyya
Abstract
This paper presents a simple method of linewidth enhancement factor (LEF) measurement of a semiconductor laser through narrowband optical frequency modulation (FM) generation by direct modulation. The narrowband optical FM is generated by using small-amplitude direct-current modulation, thereby limiting the resultant optical intensity modulation index level typically within 10%. The LEF is found to decrease linearly with the increase in bias current of the laser diode above threshold.
Acknowledgement
The authors acknowledge the financial assistance received from CSIR, New Delhi, under research project (03(1291)/13/EMR-II), for carrying out this work.
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- Binary to Octal and Octal to Binary Code Converter Using Mach–Zehnder Interferometer for High Speed Communication
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