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31 May 2017 Theoretical analysis of a method for extracting the phase of a phase-amplitude modulated signal generated by a direct-modulated optical injection-locked semiconductor laser
Hwan Lee, Jun-Hyung Cho, Hyuk-Kee Sung
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Optical Engineering, Vol. 56, Issue 5, 056112 (May 2017). https://doi.org/10.1117/1.OE.56.5.056112
Abstract
The phase modulation (PM) and amplitude modulation (AM) of optical signals can be achieved using a direct-modulated (DM) optical injection-locked (OIL) semiconductor laser. We propose and theoretically analyze a simple method to extract the phase component of a PM signal produced by a DM-OIL semiconductor laser. The pure AM component of the combined PM–AM signal can be isolated by square-law detection in a photodetector and can then be used to compensate for the PM–AM signal based on an optical homodyne method. Using the AM compensation technique, we successfully developed a simple and cost-effective phase extraction method applicable to the PM–AM optical signal of a DM-OIL semiconductor laser.
CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.
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Hwan Lee, Jun-Hyung Cho, and Hyuk-Kee Sung "Theoretical analysis of a method for extracting the phase of a phase-amplitude modulated signal generated by a direct-modulated optical injection-locked semiconductor laser," Optical Engineering 56(5), 056112 (31 May 2017). https://doi.org/10.1117/1.OE.56.5.056112
Received: 10 February 2017; Accepted: 11 May 2017; Published: 31 May 2017
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Cited by 9 scholarly publications.
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KEYWORDS
Amplitude modulation
Phase modulation
Semiconductor lasers
Laser optics
Modulation
Signal generators
Signal detection
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