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Narrow-linewidth external cavity laser and optical module

A laser, narrow linewidth technology, applied in the field of optical communication, can solve problems such as small volume, achieve the effect of small volume, narrow linewidth, and reduce the number of components

Inactive Publication Date: 2021-02-23
INNOLIGHT TECHNOLOGY (SUZHOU) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the tunable laser component disclosed in the above patent application has a small volume, in some more miniaturized optical modules, it is obviously necessary to have a smaller volume requirement

Method used

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  • Narrow-linewidth external cavity laser and optical module
  • Narrow-linewidth external cavity laser and optical module
  • Narrow-linewidth external cavity laser and optical module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Such as Figure 1-3As shown, the laser assembly disposed in the sealed housing 100 includes an external resonant cavity, a gain chip 310 and a tunable wavelength selection element 320 disposed in the external resonant cavity, and the sealed housing 100 is also provided with a coupling lens 330 and The isolator 340 is connected with the optical fiber 200 to the optical interface 110 of the sealed housing 100 , and the laser output from the laser assembly is coupled into the optical fiber 200 through the coupling lens 330 , and then transmitted to the outside of the housing 100 through the optical fiber 200 . The above-mentioned optical fiber 200 includes an optical fiber head 210 and a pigtail. Wherein, the optical fiber head 210 includes a fixed sleeve, such as a glass sleeve, in which a capillary is disposed, and one end of the pigtail is disposed in the capillary; the fixed sleeve of the optical fiber head 210 is disposed in the optical interface 110 of the housing 10...

Embodiment 2

[0053] Such as Figure 5 As shown, different from Embodiment 1, the above-mentioned laser assembly further includes an actuator 390, a cavity surface of the external resonant cavity is arranged on the actuator 390, and the above-mentioned jitter control signal is applied to the actuator 390, By adjusting the actuator 390 to shake the cavity surface of the external resonant cavity on it, the output optical signal is shaken, so as to lock the central wavelength of the output light beam. Here, the actuator may be a piezoelectric element, an acousto-optic element, an electro-optic element, a liquid crystal component, MEMS or other linear motors, and the like.

[0054] In this embodiment, the positions of the isolator 340 and the coupling lens 330 are different from those in Embodiment 1, the positions of the isolator 340 and the coupling lens 330 are exchanged, the isolator 340 is arranged behind the wavelength selection element 320, and the coupling lens 330 is integrated in a se...

Embodiment 3

[0059] Such as Figure 7 As shown, the difference from Embodiment 2 is that in this embodiment, there is no actuator in the laser assembly, but a cavity length jitter element 390a is set in the external resonant cavity, and the cavity surface of the external resonant cavity can be set on the isolator 340, or on the fourth plane 391a of the cavity-length dithering element 390a away from the wavelength selection element 320. The isolator 340 and the coupling lens 330 are arranged behind the output cavity surface of the external resonant cavity. In this embodiment, the output cavity surface of the external resonant cavity is arranged on the fourth plane 391a away from the wavelength selection element 320 of the cavity length dithering element 390a, and the isolator 340 and the coupling lens 330 are arranged behind the cavity length dithering element 390 . The jitter control signal is applied to the cavity length jitter element 390a. By controlling the cavity length jitter element...

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Abstract

The application discloses a narrow-linewidth external cavity laser, which comprises a sealed shell, an external resonant cavity arranged in the sealed shell, a gain chip arranged in the external resonant cavity and a tunable wavelength selection element; an electrical interface of the sealed shell is used for transmitting electrical signals such as a driving signal, a wave selection signal, a cavity length control signal and a jitter control signal; the cavity length control signal is used for adjusting the optical cavity length of the external resonant cavity, so that the laser mode is aligned with the wavelength of the wavelength selection element; the jitter control signal controls the optical cavity length of the external resonant cavity to jitter by adjusting the gain chip so as to lock the central wavelength of the output light beam. A jitter control signal acts on the gain chip, the number of elements in the external cavity is reduced; on one hand, the packaging size can be greatly reduced, and the size is smaller; and on the other hand, the insertion loss of the outer cavity can be effectively reduced, the influence of the insertion loss on the laser power and the line width is further reduced, and more stable and narrower-line-width laser is output in cooperation with a laser mode capable of being finely adjusted.

Description

technical field [0001] The present application relates to the technical field of optical communication, in particular to a narrow linewidth external cavity laser and an optical module. Background technique [0002] Coherent optical communication is an important technology to solve the problem of dispersion in medium and long-distance transmission in the field of optical communication. Wavelength tunable lasers are the core components of coherent optical transmitters, especially tunable external cavity lasers have narrow linewidth characteristics, which are well solved The problem of dispersion in long-distance transmission is solved. [0003] Miniaturized packaging has always been the development trend of tunable lasers, which are required to be applicable to optical modules in various packaging forms. Chinese patent application "Small Packaged Tunable Laser Components" (Application No.: 201410059069.1) discloses a miniaturized tunable laser, which has a housing with a volu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/042H01S5/06H01S5/10H01S5/14
CPCH01S5/042H01S5/06H01S5/10H01S5/141
Inventor 涂文凯骆亮
Owner INNOLIGHT TECHNOLOGY (SUZHOU) LTD
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