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Regulatable optical-fibre delay line with narrow line and wide seleted spectrum

An all-fiber, narrow-linewidth technology, which is applied in the coupling of optical waveguides, electrical components, electromagnetic wave transmission systems, etc., can solve the problems of poor flexibility, large size, and large number of optical fibers, and achieve the effect of stable and reliable use and easy instrumentation

Inactive Publication Date: 2004-06-30
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this structure is that the flexibility is relatively poor. After the delay line device is installed, the delay amount and its variable series are fixed.
At the same time, the number of optical fibers in the whole device is relatively large, which brings great difficulties to practical application.

Method used

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  • Regulatable optical-fibre delay line with narrow line and wide seleted spectrum
  • Regulatable optical-fibre delay line with narrow line and wide seleted spectrum
  • Regulatable optical-fibre delay line with narrow line and wide seleted spectrum

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Embodiment Construction

[0018] The present invention can be used in many occasions of optical information processing. Such as image 3 According to the structure, the number of delay fiber 2 segments is N=2, and the number of tuning fiber gratings is N=2. Input port K from fiber optic circulator 1 cr The input optical signal consists of two successive data packets of wavelengths λ1 and λ2 with unequal wavelengths. Such as image 3 The waveform on the time t axis shown in λ. Enter the frequency-selective adjustable delay line 4 through the optical fiber circulator 1. Data packets of different wavelengths are respectively reflected on the tuned fiber grating 3 corresponding to the wavelength. The first tuned fiber Bragg grating 3 is provided with a distributed micro heater 5, so that it is tuned to pass through the first data packet λ1 of the first tuned fiber Bragg grating 3 . And for the second data packet λ2 is reflected. Therefore, the second data packet λ2 is reflected back by the first tun...

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Abstract

A narrow-line frequency-selecting regulatable optical fibre delay line is composed of optical fibre circulator with 3 ports, at least two delaying optical fibre segments, and at least two tunable optical fibre rasters. At least one of said raster has the distributed microheater. Its advantages are full fibre device, regulatable delay, and high precision.

Description

Technical field: [0001] The invention is a narrow-width frequency-selective all-fiber adjustable delay line (also called a delay line), which is widely used in the technical fields of optical measurement, optical devices and optical fiber communication. Background technique: [0002] The optical delay line is a special device that delays the arrival time of the optical pulse by changing the distance traveled by the optical pulse signal. In optical information technology, optical delay lines play a very important role. In laser ultrashort pulse technology, it is used to adjust and maintain the synchronization of two or more pulse signals. In optical measurement technology, the synchronization between optical pulses, as well as the adjustment and control of the delay difference between the two, also play a key role. In the correlative measurement technology of ultrashort optical pulse, optical delay line and harmonic effect or two-photon effect are used to complete the convo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/26
Inventor 方祖捷耿健新李琳
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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