Wavelength tunable laser with low cost and low power consumption

Abstract

The invention relates to a wavelength tunable laser with low cost and low power consumption. The wavelength tunable laser comprises a reflector, an optical etalon, a phase controller, an aspheric lens A, a laser chip, an aspheric lens B, an optical isolator, a converging lens and an optical fiber which are sequentially arranged from left to right, the laser chip is an SLD chip, the left end face and the right end face of the laser chip are plated with an anti-reflection optical film and a partial reflection optical film respectively, and the partial reflection optical film away from the end face of the reflector and the reflector form a resonant cavity of the laser. The aspherical lens A and the aspherical lens B are used for shaping light beams with larger divergence angles into parallel light with smaller divergence angles; the optical etalon is used for wavelength selection and comprises two optical parallel plain films which are arranged at intervals, the optical parallel plain films are perpendicular to or form a certain angle with the optical axis of the laser, the two optical parallel plain films are different in thickness, and the left side face and the right side face of each optical parallel plain film are plated with high-reflection optical films. And a resistor containing an electrode is photoetched on the surface of the optical parallel plain film.

Description

technical field [0001] The invention relates to a wavelength tunable laser with low cost and low power consumption. Background technique [0002] Semiconductor lasers, also known as laser diodes, are lasers that use semiconductor materials as working substances, and are the most practical and important type of lasers. It is small in size, long in life, and can be pumped by simple current injection, and its operating voltage and current are compatible with integrated circuits, so it can be monolithically integrated. And can also directly conduct current modulation with frequencies up to GHz to obtain high-speed modulated laser output. Due to these advantages, semiconductor diode lasers have been widely used in laser communications, optical storage, optical gyroscopes, laser printing, ranging, and radar. [0003] Existing semiconductor lasers are usually not wavelength-tunable, and lasers with wavelength-tunable functions have the problems of complex structure, difficult ass...

AI Technical Summary

Problems solved by technology

[0003] Existing semiconductor lasers usually have non-tunable wavelengths, but lasers with wavelength tunable functions have the problems of complex structure, difficult assembly, and high cost. At the same time, existing semiconductor lasers have high power consumption.

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