Tunable Laser
Wavelength-tunable light sources are widely used in optical communication, spectroscopy, biomedical and other fields. Their working principle is generally to change the output wavelength within a certain range by changing the operating conditions of the light source, such as temperature, pressure, current, etc., changing the resonator structure or changing the laser medium. With the development of science and technology, the demand for light sources is also increasing, especially in the field of optical communication, where precise control of the light source's wavelength and output power stability is required to meet the precision measurement needs of various devices.; 1. Benchtop External Cavity Tunable Laser; The TSL series of benchtop high-performance tunable lasers use a grating to select the wavelength to achieve external longitudinal single-mode oscillation, adopting the Littman-Metcalf configuration, and select the wavelength by changing the resonator length in the grating, achieving mode-hop-free operation over the entire working range.; TSL Selection Table:; 2. High-Speed Swept Multimode Laser; The SL series lasers are external cavity multimode lasers that can achieve very fast wavelength scanning by using a polygon scanner or MEMS chip in the wavelength scanning mechanism. Because the light source oscillates in multiple modes, it has a wider bandwidth and shorter coherence length compared to our single-longitudinal-mode lasers. However, the fast, repeated wavelength scanning characteristics make it suitable for applications requiring real-time monitoring, such as optical coherence tomography.
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