KR910006748A - Integrated Interferometric Fiber Gyroscope Module and Method - Google Patents

Abstract

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Description

Integrated Interferometric Fiber Gyroscope Module and Method

As this is a public information case, the full text was not included.

1 is a plan view of an integrated optical module in accordance with the present invention showing an optical component mounted on a substrate to form an optical fiber rotation sensor.

FIG. 2 shows a pair of optical fibers coupled corresponding to optical waveguides formed in the substrate of FIG. 1, and a pair of polarizers formed on the substrate to polarize light rays transmitted within the waveguide.

3 illustrates a third optical fiber coupled with a third waveguide formed in a substrate.

Claims (8)

In the integrated optical module 10 for mounting between the optical fiber 42 which receives the light beam from the light source 48 and the optical fiber sensing coil 46 for forming the optical rotation sensor 19, a controllable refractive index is provided. A first waveguide 14 having a substrate 12 made of an optically active material having a second and third waveguide 15-16 connected to an optical fiber 42 for receiving an optical signal from a light source 48. A plurality of optical waveguides 14-16 and three optical waveguides 14-16 formed in the substrate 12 and connected to the junction 17, which are connected to opposite ends of the optical fiber sensing coil 46. Means 40, 41, 54 formed on the substrate 12 to polarize the optical signals transmitted to each of the, formed on the substrate 12 over the junction 17 to modulate the birefringence of the junction 17 Means 18, means formed on the substrate 12 over a portion of the first waveguide 14 to modulate the birefringence of the junction, and a second And differential phase modulator means formed on the substrate 12 for modulating the phase difference between the optical waves transmitted in the third waveguide 15 and 16 and for modulating the birefringence of the second and third waveguides 15 and 16. Integrated optical module (10). 2. The dielectric buffer 112 according to claim 1, wherein the polarizing means 54 is connected to the optical fiber 42 and disposed on the adjacent first waveguide 14, and a metal film disposed on the dielectric buffer 112. And an integrated optical module (10). The first electrode (62) of claim 1, wherein means (18) for modulating the birefringence of the junction (17) are formed on the substrate (12) and separated from the junction (17) of the waveguide (14-16), A second electrode 64 formed on the substrate 12 and spaced apart from the junction 17 of the waveguides 14-16 such that the junction 17 is between the first and second electrodes 62, 64. The third electrode 60 formed on the substrate 12 between the first and second electrodes 62, 64 on the junction 17 of the two waveguides 14-16, and the vertical in the junction 17. Integrated optical modules 10, characterized by (V ₁ , V ₂ ) for applying electrical signals to three electrodes 62, 64, 60 to form electric field components The method according to claim 1, wherein the differential phase modulation means (100) comprises a first electrode (101), a second waveguide (15) formed on a substrate (12) between second and third waveguides (15-16). The substrate 12 such that the second electrode 102, the third waveguide 16, formed on the substrate 12 so as to be between the first and second electrodes 101, 102, is between the first and third electrodes 101, 103. ), a third electrode 103, the second waveguide (15) means for applying a first electrical signal between the first and the second electrodes 101 and 102 to control the refractive index (V ₃ a) formed in, and the Integrated optical modules (10), characterized in that it comprises means (V ₄ ) for applying a second electrical signal between the first and third electrodes (101, 103) to control the refractive index of the three waveguides (16). The light source (3) according to claim 1, wherein the polarizing means (40, 41, 54) are formed on the first waveguide (14) and before the light beams input to the first waveguide (14) reach the first polarizer (40). 48 formed on the first polarizer 40, the second waveguide 15 and arranged to transmit a distance of at least one polarization length of the light beam output from the first waveguide 14 and the second waveguide 15. A second polarizer 41 arranged to transmit a distance of at least one polarization length of the light beam output from the light source 48 in the second waveguide 15 before the incoming light beam reaches the second polarizer 41. ), And at least one polarization length of the light beams formed on the third waveguide 16 and output from the light source 48 before the light rays input to the third waveguide 16 reach the third polarizer 54. A third polarizer 54 disposed to transmit a distance within the third waveguide 16, the first polarizer 40 being guided by the first waveguide 14. Is separated from the junction 17 by a distance of at least one polarization length of the light beam 10. The method of claim 5, characterized in that the length of the first waveguide 14 is equal to the length of at least one polarization of the light beam output from the light source 48 lying between the birefringent modulator 18 and the first polarizer 40. Integrated optical modules 10 10. The integrated optical modules (10) according to claim 1, wherein the second and third waveguides (15, 16) have a length different from the minimum coherence length of the light beams output from the light source (48). The integrated optical module (10) according to claim 1, wherein the substrate (10) is formed to include an electro-optical activating material, a magneto-optical activating material, a thermo-optic activating material and an acoustooptic activating material. ※ Note: The disclosure is based on the initial application.