An Electrooptic Feedforward System for Dynamic Control of a Quasi-Continuous-Wave Chirped Laser Source

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IEEE Photonics Technology Letters, ISSN: 1041-1135, Vol: 21, Issue: 17, Page: 1226-1228

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Dimitrios Mandridis; Ibrahim Ozdur; Peter J. Delfyett
Institute of Electrical and Electronics Engineers (IEEE)
Engineering; Materials Science; Physics and Astronomy; Analog-to-digital (A/D) conversion; feedforward systems; laser radar; mode-locked lasers; optical tomography; TO-DIGITAL CONVERTER; MATHEMATICAL-THEORY; COMMUNICATION; JITTER; Engineering; Electrical & Electronic; Optics; Physics; Applied
article description
In this letter, a feedforward system is developed for control of a quasi-continuous-wave (CW) chirped source. The goal of this study is to improve the uniformity of the temporal profile of a quasi-CW chirped laser source. The chirped spectrum input to the system is dynamically flattened using a feedforward scheme having bandwidth in excess of 1 GHz, resulting in more than three times reduction on the contrast of the input spectrum. A uniform chirped spectrum laser source can be used in time-stretched photonic analog-to-digital conversion, as part of laser radar system, or for optical coherence tomography. © 2009 IEEE.