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Wavelength tunable external cavity laser

A laser and wavelength technology, applied in the field of lasers, can solve the problems of low coupling tolerance, difficult coupling, unreasonable design of laser resonator, etc., and achieve the effect of high coupling tolerance, low coupling difficulty and compact structure

Inactive Publication Date: 2019-06-18
INNOLIGHT TECHNOLOGY (SUZHOU) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The technical effect of this innovation lies on improving the efficiency or performance of an optical device by reducing its size while maintaining good quality standards for it's components. This results from having four ends instead of just two, making them easier to connect without requiring extra steps during assembly.

Problems solved by technology

The technical problem addressed in this patented text relates to improving the performance of externally cavity type lasers by reducing their size while maintaining good optical quality at different frequencies or with improved efficiency compared to previous designs that had issues like poor alignment between components and increased sensitivity towards misalignment caused by temperature changes during operation.

Method used

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  • Wavelength tunable external cavity laser
  • Wavelength tunable external cavity laser

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Embodiment 1

[0024] ginseng figure 1 and figure 2 , an embodiment of the present invention provides a wavelength tunable external cavity laser 100, the external cavity laser 100 includes a laser gain chip 10, a collimating lens 20, a tunable filter arranged in sequence on the optical path of the beam 30 and lens 40.

[0025] In order to clearly express the position and direction described in this application, the direction along the optical path of the beam from the laser gain chip 10 to the lens 40 is defined as "front", otherwise, the direction from the lens 40 to the laser gain The orientation of the chip 10 is defined as "rear". Correspondingly, it can be understood that the laser gain chip 10 , the collimator lens 20 , the tunable filter 30 , and the lens 40 are arranged sequentially from back to front.

[0026] The laser gain chip 10 is used to emit divergent beams, and can amplify the gain of the divergent beams. The light beam emitted by the laser gain chip 10 is emitted to th...

Embodiment 2

[0042] Another embodiment of the present invention provides a wavelength-tunable external cavity laser. The difference between this embodiment and the above-mentioned embodiment 1 is that: the first end surface of the laser gain chip is coated with a total reflection film, and The backlight detects the position of the chip. This difference will be described below, and other structures / components that are the same as those in Embodiment 1 above will not be described again.

[0043] In this embodiment, the first end surface of the laser gain chip is coated with a total reflection film, so as to improve the light extraction efficiency of the external cavity laser. In this way, part of the light beam on the fourth end face is reflected back into the laser resonator of the external cavity laser, passes through the tunable filter, the collimator lens, and then transmits into the laser In the gain chip, and collide with the divergent light beam generated by the laser gain chip to ac...

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Abstract

The invention discloses a wavelength tunable external cavity laser. The external cavity laser includes a laser gain chip, a collimating lens, a tunable optical filter, and a lens arranged in sequence;the laser gain chip is used for emitting a light beam; the collimating lens is used for collimating the light beam into a parallel light beam; the lens includes a third end face relatively close to the tunable optical filter and a fourth end face relatively far from the tunable optical filter; the light beam emitted by the laser gain chip is sequentially emitted to the collimating lens, the tunable optical filter and the lens. The wavelength tunable external cavity laser is characterized in that: a focus of the lens falls on the fourth end face and the fourth end face is plated with a partialreflection and partial transmission film; and the fourth end face and one end face of the laser gain chip are outer cavity surfaces. The external cavity laser disclosed by the invention only needs toperform coupling once in front of the fourth end face; therefore, the coupling difficulty is small, the coupling tolerance is high, the structure is compact, and the process is simple.

Description

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Claims

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Application Information

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Owner INNOLIGHT TECHNOLOGY (SUZHOU) LTD