Maskless preparation device and method of a chalcogenide optical fiber grating

A technology for fiber gratings and preparation devices, which is applied to microlithography exposure equipment, photolithography exposure devices, cladding optical fibers, etc., and can solve the problem of long processing time, limited processing area and difficult number of pulses in the laser direct writing method. Control and other issues, to achieve good practical value and application prospects, low cost, simple structure

Active Publication Date: 2019-04-16
NINGBO UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The laser direct writing method has long processing time and low efficiency, and the processing area is limited and it is difficult to control the light intensity, processing time, pulse number, etc., and it is difficult to write the required grating

Method used

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  • Maskless preparation device and method of a chalcogenide optical fiber grating

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Experimental program
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Embodiment 1

[0023] Embodiment 1: A maskless preparation device for chalcogenide fiber gratings, such as figure 1 As shown, it includes a laser light source 1, an attenuation plate 2, a laser light source collimating optical system 3, a digital micromirror device (ie DMD) 4, a beam splitter 5, an imaging optical system 6, a mobile working platform 7, a CCD 81 and a computer 82, A chalcogenide optical fiber 9 is placed on the mobile working platform 7. The laser light source 1 is an athermal femtosecond laser with a wavelength of 800 nm and a repetition rate of 1 kHz. The directions of the laser pulses emitted by the laser light source 1 are arranged sequentially, and the chip of the digital micromirror device 4 is loaded with the graphics of the preset target grating, and the laser pulses reflected by the digital micromirror device 4 are divided into two beams, that is, the first laser beam 41 And the second laser beam 42, the first laser beam 41 keeps the direction of reflection and conti...

Embodiment 2

[0035] Embodiment 2: A maskless preparation device of a chalcogenide fiber grating, such as figure 1 As shown, it includes laser light source 1, attenuation sheet 2, laser light source collimating optical system 3, digital micromirror device 4, beam splitter 5, imaging optical system 6, mobile working platform 7, CCD 81 and computer 82, mobile working platform 7 A chalcogenide optical fiber 9 is placed on it, the laser light source 1 is an athermal effect femtosecond laser with a wavelength of 800nm ​​and a repetition rate of 1kHz, the attenuation plate 2, the laser light source collimating optical system 3 and the digital micromirror device 4 emit along the laser light source 1 The laser pulse direction of the digital micromirror device 4 is laid out sequentially, and the chip of the digital micromirror device 4 is loaded with the pattern of the preset target grating, and the laser pulse reflected by the digital micromirror device 4 is divided into two beams, that is, the firs...

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Abstract

The invention discloses a chalcogenide fiber grating maskless preparation device and method. The device comprises a laser light source, an attenuation slice, a laser light source collimation optical system, a digital micromirror device, a beam splitter mirror, an imaging optical system, a mobile working platform, a CCD and a computer. The maskless preparation device is simple in structure and efficient, does not need an expensive mask plate, is low in cost and is high in operability; when a chalcogenide fiber grating is prepared by utilizing the device, features of the digital micromirror device can be utilized fully, and dynamic images can be generated through the digital micromirror device; compared with a conventional method, the preparation method is simpler; a conventional mask plate is replaced, thereby preventing the defect that the mask plate cannot be in repetitive cycle use, and saving resources; the preparation device is flexible to operate; writing period of the fiber grating is controllable; and finally, high-efficiency and maskless writing of the chalcogenide fiber grating is realized, and uniform-structure or non-uniform-structure fiber grating is obtained. The device and method have better practical value and application prospect.

Description

technical field [0001] The invention relates to a writing device and method for optical fiber gratings, in particular to a maskless preparation device and method for chalcogenide optical fiber gratings. Background technique [0002] As a new type of optical fiber device, fiber grating represents the new progress of optical fiber technology. It has the characteristics of small size, small fusion loss, full compatibility with optical fiber, strong anti-electromagnetic interference, chemical stability and electrical insulation. Production and development play an important role. In recent years, significant progress has been made in the research of quartz fiber gratings used in the communication band, mainly focusing on the growth kinetics, optical characteristics and grating technology of fiber gratings under ultraviolet light irradiation. The preparation technology of quartz fiber grating is becoming more and more mature. At this stage, it mainly focuses on the production of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/02G03F7/20
CPCG02B6/02147G03F7/70358
Inventor 曾江辉张培晴张倩戴世勋王训四许银生刘自军张巍吴越豪
Owner NINGBO UNIV
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