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Shahriari N, Gholami A, Hekmat M J, Pourshab N, Kanani M. Spectrum Width Measurement of narrow linewidth lasers based on self Homodyne method using phase modulator. ICOP & ICPET _ INPC _ ICOFS 2015; 21 :905-908
URL: http://opsi.ir/article-1-753-en.html
URL: http://opsi.ir/article-1-753-en.html
Narges Shahriari *1 
, Asghar Gholami1 , Mohammad Javad Hekmat1 , Nastaran Pourshab1 , Mohammad Kanani1
, Asghar Gholami1 , Mohammad Javad Hekmat1 , Nastaran Pourshab1 , Mohammad Kanani1
1- Isfahan University of Technology
Abstract: (4359 Views)
In this paper, a modified Self Homodyne using phase modulator and short delay fiber length in order to measure the spectral width of a laser diode is presented. Due to short delay fiber, 1/f low frequency noise has been filtered from spectrum. So possibility of measuring the broadening of the spectrum due to white noise (the width of the Lorentzian spectrum) is provided. By use of this method, the linewidth of a 1550 nm laser diode with 83 kHz spectrum width has been measured. The result data of linewidth measurement using RF spectrum Analyzer (directly) and software are compared.
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