Phase modulator performance parameter testing device based on beam coherent combination

A phase modulator and coherent synthesis technology, which is used in optical instrument testing, measuring devices, testing optical performance, etc., can solve the problem of not being able to solve the problem of accurate measurement of the phase shift coefficient and resonant frequency of the phase modulator.
CN102998094AActive Publication Date: 2013-03-27北京鸿羚科技有限公司
4 Cites 16 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
北京鸿羚科技有限公司
Publication Date
2013-03-27

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a phase modulator performance parameter testing device based on beam coherent combination. The phase modulator performance parameter testing device comprises a laser (1), a 1*2 optical beam splitter (2), a first optical fiber, a second optical fiber, a third optical fiber and a fourth optical fiber, a phase modular (4), a first optical collimator, a second optical collimator, a beam combining lens (6), a beam splitter prism (7), a first microobjective, a second microobjective, a digital camera (9), a pinhole (10), a photoelectric detector (11), a frequency response tester (12) and a computer (13). The phase modulator performance parameter testing device simplifies measurement of phase modulator performance parameters and can measure all phase modulators with optical fiber interfaces. Simultaneously, the device can roughly estimate and accurately measure resonant frequency. When accuracy requirements are not high, the digital camera is used for observing far field speckle contrast to obtain the resonant frequency simply and rapidly; and when the accuracy requirements are high, accurate resonant frequency is obtained through analysis and calculation of signals acquired by the photoelectric detector.
Need to check novelty before this filing date? Find Prior Art

Description

Technical field

[0001] The invention relates to the field of optical instruments and measurement, in particular to a device and method for testing performance parameters of a phase modulator, in particular to a device and method for testing the phase shift coefficient and resonance frequency of the phase modulator. Background technique

[0002] Phase modulators have a wide range of applications in beam coherent combination, optical communication, optical sensing and other fields. In the field of beam coherent synthesis, the phase modulator is the core component of the synthesis system. A certain control algorithm is used to control the phase modulator to compensate for the phase difference between the beams, so that the phases of two or more lights are consistent; in the field of coherent optical communication , The phase modulator can be used to load the signal to be transmitted on the carrier to complete the signal transmission; in the field of optical sensing, the phase modula...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More