Single-mode fiber ring laser and its working method, laser system
A ring laser, single-mode fiber technology, applied in lasers, laser parts, phonon exciters, etc., can solve the problems of high cost, environmental interference, complex structure, etc., and achieve the effect of simple structure and low cost
Active Publication Date: 2021-10-26
JINAN UNIVERSITY
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However, such a system requires two spatially distributed subspaces, which will lead to complex structures, high costs, and susceptibility to environmental disturbances
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[0025] Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the specific embodiments set forth herein. Rather, the embodiments are provided to explain the principles of the invention and its practical application, thereby enabling others skilled in the art to understand the invention for various embodiments and with various modifications as are suited to particular intended uses.
[0026] figure 1 is a schematic diagram showing the structure of a single-mode fiber ring laser based on parity time symmetry according to an embodiment of the present invention.
[0027] refer to figure 1 , the single-mode fiber ring laser based on parity time symmetry according to an embodiment of the present invention includes a physical ring (or space ring, which exists both physically and in actual space) PL. ...
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A single-mode fiber ring laser based on parity time symmetry is proposed, which includes only one physical ring, and the physical ring has a birefringence device including a first parity time symmetry controller and a second parity time symmetry controller. The polarized light coupling device of the device; wherein, the birefringence device is used for birefringence of light to form polarized light of two different polarization states; the polarized light coupling device is used to couple the polarized light of two different polarization states; wherein , by tuning the first parity time symmetric controller and the second parity time symmetric controller to achieve parity time symmetry in the physical ring. Also provided are a working method of the single-mode fiber ring laser and a laser system having the single-mode fiber ring laser. The invention realizes the formation of two mutually coupled polarization rings in a single physical ring, and realizes a stable single longitudinal mode laser, and the realized single mode fiber ring laser has a simple structure and low cost.
Description
technical field [0001] The invention belongs to the field of optoelectronic technology, and in particular relates to a single-mode fiber ring laser based on parity time symmetry, its working method and a laser system. Background technique [0002] A parity-time symmetric system is a special kind of non-Hermitian system whose Hamiltonian has real eigenvalues. Recently, parity time symmetry has been extensively studied in photonic and optoelectronic systems. A major reason is its effectiveness for mode selection in optical or optoelectronic systems. [0003] Parity time symmetry has been proven to be an effective solution to achieve mode selection in photonic systems. Conventional parity-time-symmetric systems are PT-symmetric systems realized between two cross-coupled and spatially distributed optical subspaces, which (i.e., physically existent physical spaces) are designed to have the same geometrical shape, and have complementary gain and loss coefficients. Such a parit...
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IPC IPC(8): H01S3/067
CPCH01S3/06712H01S3/0675H01S3/06791
Inventor 张杰君李凌志邹昱婷姚建平曹元郅燕燕冯新焕关柏鸥
Owner JINAN UNIVERSITY