Ring laser gyroscope with active volume bragg grating

A volume Bragg grating, ring laser gyroscope technology, applied in Sagnac effect gyroscopes, gyroscopes/steering sensing devices, diffraction gratings, etc., can solve problems such as the life of complex processing technology

Pending Publication Date: 2021-04-02
HONEYWELL INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The gaseous nature of the gain medium requires complex handling techniques and has a limited lifetime due to gas leakage

Method used

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  • Ring laser gyroscope with active volume bragg grating
  • Ring laser gyroscope with active volume bragg grating
  • Ring laser gyroscope with active volume bragg grating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Embodiment 1 includes a ring laser gyroscope comprising: an optical block defining an optical closed loop path; at least one mirror structure mounted on the optical block and connected to the optical block; a closed-loop path in optical communication; at least one volume Bragg grating mounted on the optical block and in optical communication with the optical closed-loop path; and a first pump laser in communication with said volume Bragg grating is in optical communication with said first pump laser for emitting a beam at a selected angle of incidence such that said beam passes through said volume Bragg grating and overlaps said optical closed-loop path; wherein said volume a Bragg grating can be used as a gain medium to increase the optical power of the beam; wherein a pair of counter-propagating beams is generated by the beam within the optical closed loop path; wherein the mirror structure and the volume Bragg grating are positioned and suitably angled to reflect the...

Embodiment 2

[0055] Embodiment 2 includes the ring laser gyroscope of embodiment 1, wherein the volume Bragg grating comprises rare earth doped glass.

Embodiment 3

[0056] Embodiment 3 includes the ring laser gyroscope according to any one of embodiments 1-2, wherein the volume Bragg grating comprises neodymium (Nd) doped glass, ytterbium doped (Yb) glass or erbium doped (Er) glass.

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Abstract

The present invention relates to and provides a ring laser gyroscope with an active volume bragg grating. The ring laser gyroscope comprises an optical block that defines an optical closed loop pathway; at least one mirror structure mounted on the optical block and in communication with the closed loop pathway; at least one volume Bragg grating mounted on the optical block and in communication with the closed loop pathway; and a pump laser which is in communication with the volume Bragg grating and is operative to emit a light beam at a selected incident angle, such that the beam passes through the volume Bragg grating and overlaps with the closed loop pathway. The volume Bragg grating is operative as a gain medium to increase an optical power of the beam, and a pair of counter-propagatingbeams is produced within the closed loop pathway from the beam. The mirror structure and the volume Bragg grating are positioned and angled to reflect the counter-propagating beams around the closedloop pathway.

Description

Background technique [0001] Ring laser gyroscopes, such as helium-neon (He-Ne) ring laser gyroscopes, have been used in many navigation systems for many years. The He-Ne ring laser gyroscope uses He-Ne gas as a gain medium to generate bidirectional laser light to detect the Sagnac phase shift due to rotation. The gaseous nature of the gain medium requires complex handling techniques and has a limited lifetime due to gas leakage. [0002] Therefore, there is a need for a solid state material for use as a gain medium in a ring laser gyroscope that will provide longer life and eliminate some of the expansive fixtures designed for use with gas lasers in ring laser gyroscopes. Contents of the invention [0003] A ring laser gyroscope comprising: an optical block defining an optical closed-loop path; at least one mirror structure mounted on the optical block and in optical communication with the optical closed-loop path; at least one volume Bragg grating, the at least one a volu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C19/72G02B5/18
CPCG01C19/72G01C19/721G02B5/18G01C19/661
Inventor 吴剑峰卡尔·D·纳尔逊特里萨·马尔塔艾伦·布鲁斯·塔弛贝里
Owner HONEYWELL INT INC
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