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Method for producing super-continuum spectrum under incoherent light pump in optical fiber

An incoherent light and incoherent technology, applied in optics, nonlinear optics, instruments, etc., can solve the problems of incomplete research and the need to improve the efficiency of supercontinuum under incoherent optical pumping

Inactive Publication Date: 2017-06-13
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] According to the theory of optical coherence, the random fluctuation of amplitude and phase is only one aspect to measure the coherence characteristics of the optical field. The efficiency of supercontinuum generation needs to be improved

Method used

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  • Method for producing super-continuum spectrum under incoherent light pump in optical fiber
  • Method for producing super-continuum spectrum under incoherent light pump in optical fiber
  • Method for producing super-continuum spectrum under incoherent light pump in optical fiber

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Embodiment 1

[0027] Such as figure 1 As shown, in the present embodiment, a method for supercontinuum generation under incoherent optical pumping in an optical fiber comprises the following steps:

[0028] S101: Coupling incoherent light into a filter to obtain filtered incoherent light, wherein the central wavelength of the filter is located in a weak anomalous dispersion region of a highly nonlinear optical fiber;

[0029] S102: coupling the filtered incoherent light into a polarizer to obtain linearly polarized incoherent light;

[0030] S103: coupling linearly polarized incoherent light into an amplifier for amplification; and

[0031] S104: The amplified linearly polarized incoherent light is coupled into the high nonlinear fiber as the pump light, the spectrum of the pump light is greatly broadened in the high nonlinear fiber, and the super nonlinear fiber is obtained at the output end of the high nonlinear fiber. continuous spectrum.

[0032] In this embodiment, the incoherent li...

Embodiment 2

[0042] In the above-mentioned embodiment 1, a fiber amplifier is used to increase the input power of the incoherent light coupled into the highly nonlinear fiber. If the power of the incoherent light source itself is very high, the incoherent light can be amplified without an amplifier. In the case of not using an amplifier, a method for generating a supercontinuum under incoherent optical pumping in an optical fiber is the method of Embodiment 2, such as Image 6 As shown, it includes the following steps:

[0043] S601: Coupling incoherent light into a filter to obtain filtered incoherent light, wherein the central wavelength of the filter is located in an anomalous dispersion region near the zero-dispersion wavelength of a highly nonlinear optical fiber;

[0044] S602: Coupling the filtered incoherent light into a polarizer to obtain linearly polarized incoherent light; and

[0045] S603: Coupling linearly polarized incoherent light into a highly nonlinear optical fiber, a...

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Abstract

The invention discloses a method for producing a super-continuum spectrum under an incoherent light pump in optical fiber, and relates to the field of nonlinear optical fiber optics. The method comprises the steps of coupling incoherent light into a filter to obtain incoherent light which is subjected to filtering; coupling filtered incoherent light into a polarizer to obtain incoherent light which is subjected to linear polarization; adopting the incoherent light which is subjected to linear polarization as pump light and then coupling the pump light into high nonlinearity polarization-maintaining optical fiber, and obtaining the super-continuum spectrum on an output end of the high nonlinearity polarization-maintaining optical fiber. According to the method for producing the super-continuum spectrum under the incoherent light optical pump in the optical fiber, the super-continuum spectrum of which the frequency spectrum is smoother can be achieved under the same pump power.

Description

technical field [0001] The invention relates to the field of nonlinear fiber optics, in particular to a method for generating supercontinuum under incoherent light pumping in an optical fiber. Background technique [0002] Supercontinuum light source has become a research hotspot in the field of optics because of its wide application in many fields such as spectral measurement, biomedical imaging, and optical sensing. The generation of supercontinuum in optical fiber is based on the result of the great broadening of the spectrum caused by the joint action of various nonlinear effects in the optical fiber. Compared with the supercontinuum generated by pulsed pumping, the supercontinuum generated by continuous optical pumping has the following advantages: higher power spectral density, lower relative intensity noise, and flatter spectrum. [0003] In the study of supercontinuum generation under continuous optical pumping, it was found that modulation instability is one of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/365G02F1/35
CPCG02F1/3501G02F1/365G02F1/3503G02F1/3528
Inventor 董鹏
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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