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  • 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference
  • (Optica Publishing Group, 2015),
  • paper CH_8_1

Effect of Injection Current on Signal Strength in a Single-Mode Laser Diode Optical Feedback Interferometer Subject to Weak Feedback

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Abstract

Optical feedback interferometry (OFI) sensing is widely deployed in industrial and laboratory environments, due to its simple and low-cost optical setup compared to conventional interferometry techniques, in many sensing applications such as: the measurement of displacement, distance, velocity and vibration [1]. OFI signals can be acquired either through the observation of the power fluctuations with a monitoring photodiode implemented on the rear facet of the laser diode (PD signals) or by the amplification of the variations in the laser diode voltage (LV signals) [2]. In both methods, maximum signal-to-noise-ratio (SNR) should be maintained to achieve the best performance of the sensor.

© 2015 IEEE

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