Method for manufacturing tunable chirped fiber grating

A chirped fiber grating and a manufacturing method are applied in the directions of cladding optical fibers, optical waveguides and light guides, etc., and can solve the problems of application occasions that are difficult to meet fast tuning, difficult manufacturing processes, expensive manufacturing equipment, etc. Stable, simple process effect

Inactive Publication Date: 2011-07-13
JINAN UNIVERSITY
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Problems solved by technology

However, this method needs steps such as plating metal film on the optical fiber, leading out electrodes, etc. The manufacturing process is relatively difficult, and the manufacturing equipment is also relatively expensive, and its application is also limited to a certain extent.
In addition, the tuning speed achieved by these methods is relatively slow, which is difficult to meet the needs of some applications that require fast tuning.

Method used

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  • Method for manufacturing tunable chirped fiber grating
  • Method for manufacturing tunable chirped fiber grating
  • Method for manufacturing tunable chirped fiber grating

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Experimental program
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Embodiment

[0027] Such as figure 1 As shown, the fabrication method of the tunable chirped fiber grating of the present invention comprises the following steps:

[0028] (1) Use Er, Yb co-doped fiber to make uniform fiber grating, the specific process is as follows:

[0029] Use a 193nm ultraviolet laser to irradiate the mask to write the optical fiber to obtain a uniform fiber grating. During the process of writing the optical fiber, use a broadband light source and a spectrometer to monitor the writing effect of the fiber grating in real time, and use an optical isolator in the 1550nm band to protect the spectrometer.

[0030] (2) The pumping laser of 980nm band is coupled into the fiber grating made in step (1) through a wavelength division multiplexing device; the pumping laser produces a temperature gradient that gradually decreases along the laser propagation direction in the fiber grating; The refractive index of the fiber grating forms a refractive index gradient in the fiber gr...

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Abstract

The invention discloses a method for manufacturing a tunable chirped fiber grating. The method manufactures the fiber grating based on optical fiber doped in rare earth element, couples pump light into the manufactured fiber grating, and changes the refractive index of the fiber grating via a temperature gradient formed by the pump light in the fiber grating so as to convert the routine fiber grating into the chirped fiber grating. Furthermore, the method changes the refractive index of the temperature gradient field and the fiber grating by changing the power of the coupled pump light in order to implement the tunable characteristics of the chirped fiber grating and realize the tunable chirped fiber grating based on a light tuning mode. Compared with the prior art, the method in the invention is simple in process, stable in process, low in cost and quick in response speed.

Description

technical field [0001] The invention relates to the field of fiber grating manufacture, in particular to a method for making tunable chirped fiber grating. Background technique [0002] Tunable chirped fiber grating is an important fiber optic component, and it is the core component to realize tunable dispersion compensation devices, bandwidth tunable optical filters, variable optical delay lines and other important devices. It is used in various fiber optic communications and fiber optics The equipment has a wide range of applications, typical applications include dispersion compensation in optical fiber communication systems, variable delay lines in military radar arrays, etc., and has a broad market prospect. [0003] There are many conventional manufacturing methods of fiber gratings, among which the manufacturing methods and techniques of uniform fiber gratings are the most mature, and the cost is low. On the contrary, at present, the production of chirped fiber gratin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/02
Inventor 关柏鸥程凌浩
Owner JINAN UNIVERSITY
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