Device and method for expanding spectral widths

A technology of spectral width and optical fiber, which is applied in the field of optical communication, can solve problems such as the limitation of spectral width expansion effect, and achieve the effect of spectral width expansion

Inactive Publication Date: 2013-06-05
CHINA UNITED NETWORK COMM GRP CO LTD
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Problems solved by technology

[0005] However, since the spectral width of the supercontinuum is determined by the pulse peak power value of the laser pulse, and the pulse peak power value of the laser pulse needs to be set within the working range, it is impossible to increase it infinitely. Therefore, the prior art The method of extending the spectral width of the supercontinuum in the medium has limitations in the expansion effect on the spectral width

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  • Device and method for expanding spectral widths
  • Device and method for expanding spectral widths
  • Device and method for expanding spectral widths

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Embodiment Construction

[0020] The device for expanding the spectral width in each embodiment of the present invention includes an incident port and an exit port. Wherein, the incident port can receive the laser pulses emitted by the laser, and the laser used can be a fiber laser or a solid-state laser capable of providing pumping laser pulses; the exit port can be connected to an optical fiber for outputting the laser pulses processed by the device to The connected optical fiber may be various types of optical fiber such as photonic crystal optical fiber, dispersion-shifted optical fiber, highly nonlinear optical fiber or single-mode optical fiber.

[0021] figure 1 Schematic diagram of the structure of the device for expanding the spectral width provided by the embodiment of the present invention, such as figure 1 as shown in figure 1 As shown, the device for expanding the spectral width includes: a beam splitter 11 , a first plane mirror 12 , a second plane mirror 13 and a focusing lens 14 .

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Abstract

The invention provides a device and a method for expanding spectral widths. The device for expanding the spectral widths comprises a spectroscope, a first plane mirror, a second plane mirror and a focusing lens. The spectroscope is used for respectively carrying out reflex and transmission on laser pulses coming from an incidence end in an incident mode. The first plane mirror is used for carrying out reflex on a laser pulse which is reflected by the spectroscope. The second plane mirror is used for carrying out reflex on a laser pulse which is transmitted by the spectroscope. The distance between the first plane mirror and the spectroscope is unequal to the distance between the second plane mirror and the spectroscope. The spectroscope is further used for transmitting the laser pulse which is reflected by the first plane mirror to the focusing lens, and for reflecting the laser pulse which is reflected by the second plane mirror to the focusing lens. The focusing lens is used for outputting the two incident laser pulses to an optical fiber through an outgoing port. Through controlling on the sequence by which the two laser pulses enter the optical fiber, strong orphans of the two laser pulses are crashed in the optical fiber, and the spectral widths of the output laser pulses are expended.

Description

technical field [0001] Embodiments of the present invention relate to optical communication technologies, and in particular, to a device and method for extending spectral width. Background technique [0002] Super-continuum (SC) means that after the laser passes through a nonlinear material, more new frequency components are generated in the spectrum of the outgoing laser, so that the spectral width of the outgoing laser is much larger than the spectral width of the incident laser. Generally, it can reach hundreds of nanometers or even thousands of nanometers. The supercontinuum generated by using photonic crystal fibers (Photonic Crystal Fibers, PCF) has the characteristics of high output power, relatively flat broadband spectrum, and good spatial coherence. [0003] Using the supercontinuum as a light source has been used in many fields such as spectroscopic analysis, microscope imaging and optical coherence tomography. In terms of optical communication, the supercontinu...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/107H01S3/10G02F1/365G02B27/28
Inventor 刘楚简伟师严曹畅张沛王健全赵怀罡
Owner CHINA UNITED NETWORK COMM GRP CO LTD
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