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A Method of Improving Coupling Efficiency Using Femtosecond Laser Directly Writing Waveguide Coupling Region

A technology of femtosecond laser and coupling efficiency, which is applied in laser welding equipment, metal processing equipment, welding equipment, etc., can solve the problems of low coupling efficiency and fixation, and achieve the effect of improving coupling efficiency and shortening coupling length

Active Publication Date: 2021-09-21
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through the fine processing capability of the femtosecond laser, after the glass-based waveguide is processed by direct writing, different scanning powers can be used for the waveguide coupling area to achieve controllable and improved coupling efficiency between the waveguides (without affecting the basic characteristics of the waveguide, such as transmission loss and mode. ), fundamentally solve the problem of low and fixed coupling efficiency between different waveguide spacing

Method used

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  • A Method of Improving Coupling Efficiency Using Femtosecond Laser Directly Writing Waveguide Coupling Region
  • A Method of Improving Coupling Efficiency Using Femtosecond Laser Directly Writing Waveguide Coupling Region
  • A Method of Improving Coupling Efficiency Using Femtosecond Laser Directly Writing Waveguide Coupling Region

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1 qualitatively illustrates the experiment of directly writing waveguides in the waveguide coupling area to improve the coupling efficiency between waveguides.

[0034] Using femtosecond laser to directly write waveguides in the waveguide coupling area to improve the coupling efficiency between waveguides can change the coupling coefficient at a fixed waveguide spacing and shorten the coupling length between waveguides. This advantage can be used in the future. The invention of this paper is applied to the fields of quantum computing and topology to solve the problem of invariable coupling efficiency between waveguides, and can also reconfigurably design the coupling efficiency between waveguides to realize flexible transformation of coupling efficiency and transformation on demand.

[0035] A method for improving coupling efficiency by using femtosecond laser direct writing waveguide coupling region, the specific steps are as follows:

[0036] (1) Femtosecon...

Embodiment 2

[0055] Example 2 Quantitative analysis of different laser power rewriting the waveguide coupling region to realize the change of the coupling coefficient between waveguides:

[0056] (1) femtosecond laser beam expansion; same as embodiment 1.

[0057] (2) Adjustment of femtosecond laser power; same as embodiment 1.

[0058] (3) Adjustment of femtosecond laser beam shaping: same as embodiment 1.

[0059] (4) Adjustment of the femtosecond laser focus direct writing illumination module: the same as in Embodiment 1.

[0060] (5) Adjustment of the femtosecond laser focus direct writing monitoring module: the same as in Embodiment 1.

[0061] (6) Leveling of the sample stage; with embodiment 1.

[0062] (7) Femtosecond laser focus direct writing adjustment: the same as in Embodiment 1.

[0063](8) Direct writing adjustment of functional devices: put the bulk material to be processed on the sample stage—Corning glass, control the movement power of the sample stage, and perform di...

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Abstract

The invention discloses a method for improving coupling efficiency by using a femtosecond laser to directly write a waveguide coupling region, which belongs to the technical field of laser processing. Through the fine processing capability of a femtosecond laser, the invention can directly write and process a glass-based waveguide. The waveguide coupling area adopts different scanning powers to realize controllable and improved coupling efficiency between waveguides, without affecting the basic characteristics of waveguides such as transmission loss and mode, which fundamentally solves the problem of low and fixed coupling efficiency between different waveguide spacings. The practical problem of controllability and further improvement of the coupling efficiency between fixed waveguide spacings is solved by using a femtosecond laser to directly write the sandwich-like structure of the waveguide coupling region. By improving the coupling efficiency and shortening the coupling length, it can help the miniaturization of on-chip devices and integrate more functional devices per unit area.

Description

technical field [0001] The invention belongs to the technical field of laser processing, and specifically relates to the use of femtosecond laser direct writing technology to directly write to enhance the coupling efficiency of waveguide coupling regions to solve the problem of fixed coupling efficiency between waveguides. The purpose of shortening the coupling length is achieved by increasing the coupling efficiency between the direct-writing glass waveguides, which solves the problem that the coupling efficiency between the glass waveguides is fixed at different coupling spacings, and achieves the purpose of variable coupling efficiency at a fixed coupling spacing. [0002] technical background [0003] Femtosecond laser direct writing glass optical waveguide is widely used in quantum computing, quantum chips, quantum topology and other fields due to its low transmission loss and good material stability. Femtosecond laser direct writing optical waveguide uses high repetitio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/046B23K26/06B23K26/70
CPCB23K26/046B23K26/0643B23K26/0648B23K26/0652B23K26/702
Inventor 孙洪波王映德陈岐岱田振男
Owner JILIN UNIV
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