Low-voltage transmission-type optical fiber online electro-optical Q-modulation switch
A transmissive, low-voltage technology that is used in optical fiber sensing, laser processing, scientific research, military, optical fiber communication, and medical fields. It can solve the problems of limited repetition frequency adjustment range, low repetition frequency, and low reliability, and achieve reliable Excellent performance and performance, wide pulse width adjustment range, and miniaturized package size
Inactive Publication Date: 2016-10-05
光越科技(深圳)有限公司
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[0002] In the fields of modern optical fiber sensing, optical fiber communication, laser processing, medical treatment, military affairs, scientific research and other fields, in addition to passive Q switching in pulsed fiber lasers, the active Q switching technology is mainly acousto-optic Q switching, and its pulse width is relatively small. Wide, the peak power is not high, and the repetition rate adjustment range is limited
However, traditional electro-optic Q-switching is mainly used in solid-state or gas lasers, which are large in size, low in repetition rate, sensitive to polarization, and have a relatively high half-wave voltage, requiring several thousand volts of high-voltage pulse drive, which is likely to cause interference to other electronic circuits. Without fiber optics, it is inconvenient to use and has low reliability in occasions that require optical fibers; at the same time, due to the polarization-sensitive characteristics of traditional electro-optical Q-switching devices, it is difficult to apply to optical fiber occasions
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[0025] like figure 1 As shown, the first single-fiber collimator consists of a first optical fiber 1, a first single-fiber capillary 2 for fixing the first optical fiber 1 and facilitating coupling alignment, a first positive lens 3 with collimating effect, a first fixed The first optical fiber 1 is fixed inside the first single-fiber capillary 2 through the fixing material, and then the end face of the first optical fiber 1 is ground and polished at a certain angle. In order to suppress the reflected light, and anti-reflection coating can be coated to obtain optimized performance; after debugging, the end face of the first optical fiber 1 should be located on the back focal plane of the first positive lens 3 to achieve a good collimation effect; when discussing performance, The first optical fiber 1 is defined as port one.
[0026] The second single-fiber collimator consists of a second optical fiber 16, a second single-fiber capillary 15 for fixing the second optical fiber ...
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Abstract
A low-voltage transmission-type optical fiber online electro-optical Q-modulation switch is composed of a first single fiber collimator, a first polarization element assembly, an electro-optical crystal assembly, a second polarization element assembly, a second single fiber collimator and a control power supply. The low-voltage transmission-type optical fiber online electro-optical Q-modulation switch is compact in size and convenient to miniaturize; the modulation frequency is high and adjustable in a very wide range; the extinction ratio is high, and thus the laser peak power is greatly improved; the working voltage is greatly reduced on design and is lower than 1000 V, so that the reliability is improved to a large extent, and cost is greatly reduced; meanwhile, the electro-optical Q-modulation switch is fiber-based, very high usability and very high integrity are achieved, and great superiority is achieved on the structure and the performance.
Description
technical field [0001] The invention relates to the fields of optical fiber sensing, optical fiber communication, laser processing, medical treatment, military affairs, scientific research and the like, in particular to a low-voltage transmission type optical fiber online electro-optical Q-switching switch. technical background [0002] In the fields of modern optical fiber sensing, optical fiber communication, laser processing, medical treatment, military affairs, scientific research and other fields, in addition to passive Q-switching in pulsed fiber lasers, active Q-switching technology is mainly acousto-optic Q-switching, and its pulse width is relatively small. Wide, the peak power is not high, and the repetition rate adjustment range is limited. However, traditional electro-optic Q-switching is mainly used in solid-state or gas lasers, which are large in size, low in repetition rate, sensitive to polarization, and have a relatively high half-wave voltage, requiring sev...
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IPC IPC(8): G02F1/035
Inventor 曹际龙龙跃金
Owner 光越科技(深圳)有限公司
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