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This paper reports a 3-dimensional (3D) micro-optical coupling system for improving coupling efficiency in the Littrow configured micro-electro-mechanical system (MEMS) tunable lasers. In the coupling system, an optical fiber acts as a rod lens for light convergence in the vertical plane, while a deep-etched silicon parabolic mirror confines the light in the horizontal plane. Compared with previous...
This paper presents a digital mirror for tunable laser wavelength selection using microelectromechanical systems (MEMS) technology. The digital mirror which has discrete reflection spectrum is totally different compared to the current broadband mirrors MEMS tunable lasers . The reflection of the digital mirror can be tuned by digital pumping signals which promise fast output wavelength switching....
This paper presents a MEMS tunable dual-wave length laser, which simultaneously achieves wide tuning range and two-longitudinal-mode emission. The construction of this laser is based on Littman external cavity configuration. The key point is to use two micro-mirrors to select two different wavelengths at their independent diffraction modes, and the emission of both wavelengths will be collected through...
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