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Zhu, W.M., Zhang, W., Cai, H., Tamil, J., Liu, B., Bourouina, T. and Liu, A.Q. (2009) A MEMS Digital Mirror for Tunable Laser Wavelength Selection. International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS 2009), Denver, 21-25 June 2009, 2206-2209.

has been cited by the following article:

• TITLE: Performance Analysis on a Dual External Cavity Tunable Laser ECTL Source

  AUTHORS: Ahmed Fawzy, Osama M. El-Ghandour, Hesham F. A. Hamed

  KEYWORDS: External Cavity Laser, Tunable Laser, MEMS, Optical Diffraction

  JOURNAL NAME: Journal of Electromagnetic Analysis and Applications, Vol.7 No.4, April 24, 2015

  ABSTRACT: This paper presents the diffraction effects on the performance of a dual external cavity tunable laser source, whose external cavities are constructed by micro electro mechanical systems (MEMS). One of the main problems in these structures is the optical diffraction as the emitting surface of the laser diode is usually quite limited in the transverse directions. The emitted beam diffracts rapidly in the air and only a small amount of light is coupled back to the source that usually limits the tuning range of the source. Device characteristics such as tuning range, wavelength shift and sensitivity are evaluated. New expression is used and multiple reflections inside external cavities are considered. The simulation results have shown that single external cavity has limited tuning range. It is shown that multiple reflections have significant effect in our model. To get a better engineering for the dual ECTL dimensions, diffraction effects must be taken into account.