Influence of system bandwidth on self-mixing signal

Self-mixing interferometry (SMI) is a well-developed sensing technology. An SMI system can be described using a model derived from the well-known Lang and Kobayashi equations by setting the system operating in stable region. The features of an SMI signal are determined by the external optical feedback factor (denoted by C). Our recent work shows that when the factor C increases to a certain value, e.g. in moderate feedback regime with 1<C<4.6, the SMI system might enter unstable region and the existing SMI model is invalid. In this case, the SMI signals exhibit some novel features and contain higher-frequency components. To detect an SMI signal without distortion or take suitable correction on the SMI signal, it is must to make an analysis on the system bandwidth and its influence on SMI signals. The results in this paper provide useful guidance for developing an SMI sensing system.

[1]  Julien Perchoux,et al.  Laser dynamics in sawtooth-like self-mixing signals. , 2012, Optics letters.

[2]  G. Giuliani,et al.  Measurement of the linewidth enhancement factor of semiconductor lasers based on the optical feedback self-mixing effect , 2004, IEEE Photonics Technology Letters.

[3]  Silvano Donati,et al.  Optical feedback interferometry for sensing application , 2001 .

[4]  Bjarne Tromborg,et al.  Stability analysis for a semiconductor laser in an external cavity , 1984 .

[5]  Guido Giuliani,et al.  Laser diode self-mixing technique for sensing applications , 2002 .

[6]  T. Taimre,et al.  Laser feedback interferometry: a tutorial on the self-mixing effect for coherent sensing , 2015 .

[7]  G. Giuliani,et al.  Laser diode feedback interferometer for measurement of displacements without ambiguity , 1995 .

[8]  Jiangtao Xi,et al.  Measuring the feedback parameter of a semiconductor laser with external optical feedback. , 2011, Optics express.

[9]  R. Lang,et al.  External optical feedback effects on semiconductor injection laser properties , 1980 .

[10]  T. Bosch,et al.  A Self-Mixing Displacement Sensor With Fringe-Loss Compensation for Harmonic Vibrations , 2010, IEEE Photonics Technology Letters.

[11]  Jiangtao Xi,et al.  Features of a Self-Mixing Laser Diode Operating Near Relaxation Oscillation , 2016, Sensors.

[12]  Jiangtao Xi,et al.  A Fiber-Coupled Self-Mixing Laser Diode for the Measurement of Young’s Modulus , 2016, Sensors.

[13]  Yanguang Yu,et al.  Micro-displacement reconstruction using a laser self-mixing grating interferometer with multiple-diffraction. , 2017, Optics express.

[14]  Jiangtao Xi,et al.  Dynamic stability analysis for a self-mixing interferometry system. , 2014, Optics express.

[15]  J. Xi,et al.  Toward Automatic Measurement of the Linewidth-Enhancement Factor Using Optical Feedback Self-Mixing Interferometry With Weak Optical Feedback , 2007, IEEE Journal of Quantum Electronics.

[16]  S. Donati.  Developing self‐mixing interferometry for instrumentation and measurements , 2012 .

[17]  Jiangtao Xi,et al.  Laser Self-Mixing Fiber Bragg Grating Sensor for Acoustic Emission Measurement , 2018, Sensors.

[18]  J. Xi,et al.  Displacement sensing using the relaxation oscillation frequency of a laser diode with optical feedback. , 2017, Applied optics.

[19]  J. Xi,et al.  Optical Feedback Self-Mixing Interferometry With a Large Feedback Factor $C$ : Behavior Studies , 2009, IEEE Journal of Quantum Electronics.

[20]  J. Chicharo,et al.  Estimating the parameters of semiconductor lasers based on weak optical feedback self-mixing interferometry , 2005, IEEE Journal of Quantum Electronics.