Adjustable ring-shaped cavity erbium-doped optical-fiber multi-wavelength laser based on cascade HiBi optical fibers and Sagnac rings

Abstract

The invention relates to an adjustable ring-shaped cavity erbium-doped optical-fiber multi-wavelength laser based on cascade HiBi optical fibers and Sagnac rings, comprising two optical circulators and two Sagnac ring-shaped filters, wherein each Sagnac ring-shaped filter comprises 3dB optical couplers, a high-birefringence optical fiber and a polarization controller; the high-birefringence optical fibers and the polarization controllers are connected in series, and the other ends of the high-birefringence optical fibers and the polarization controllers are respectively connected with same-direction ports of the 3dB optical couplers; a pump source is connected with an erbium-doped optical fiber by a wavelength division multiplexer; the other end of the erbium-doped optical fiber is connected with the first optical circulator; the first optical circulator is connected with the first 3dB optical coupler and is connected with the second optical circulator, the second optical circulator is connected with the second 3dB optical coupler and is connected with the input end of an optical coupler; a large-splitting-ratio port of the optical coupler is connected with a port of the wavelength division multiplexer; a small-splitting-ratio port of the optical coupler is used as a laser output port; and all the components adopt optical-fiber connection. The laser has the advantages of simple structure, low cost, easy integration of optical-fiber systems and wide adjustment range.

Description

technical field [0001] The invention belongs to the technical field of optical information, and in particular relates to an adjustable ring-cavity erbium-doped fiber multi-wavelength laser based on a cascaded HiBi fiber Sagnac ring. Background technique [0002] Wavelength Division Multiplexing (WDM) technology is one of the most core technologies in the current optical communication network. This technology can greatly increase the transmission capacity on the same optical fiber. In order to build a wavelength division multiplexing system, the most traditional light source solution is to use multiple single-wavelength lasers to meet the number of channels by increasing the number of single-wavelength lasers. Obviously, this increases the manufacturing cost of the entire system and the complexity of the structure. sex. [0003] With the continuous development of wavelength division multiplexing technology, multi-wavelength lasers with stable performance, multi-wavelength ou...

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Problems solved by technology

[0005] Aiming at the shortcomings of existing multi-wavelength lasers such as high cost, complex structure, and the number of wavelength outputs, wavelength output intervals, laser output line width, and output wavelength range cannot be easily controlled, the present invention proposes a Sagnac based on cascaded HiBi fibers Ring Tunable Ring Cavity Erbium-Doped Fiber Multiwavelength Laser

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