Optical path mixing device

A technology of optical circuits and devices, applied in the field of optical communication, can solve the problems of large size and complexity, and achieve the effects of small size, convenient assembly and debugging, and cost reduction.

Inactive Publication Date: 2003-05-21
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent US5082343 only integrates two functions, and the other two patents can integrate more functions, but they are more complicated and larger

Method used

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  • Optical path mixing device
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Examples

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Embodiment Construction

[0020] to combine figure 1 , figure 2 , image 3 , Figure 4 , Figure 6 A. Figure 6 B. Figure 9 , the optical path hybrid device includes the first double-fiber collimator 2A, WDM filter plate 3, a Wedge type isolator unit (wedge angle plates 4A, 4B, Faraday rotation optical crystal 5), beam splitter 6, the second double-fiber collimator 2B, the WDM filter is pasted on the end face of the self-focusing lens (GRIN-LENS) of the first double-fiber collimator, reflecting the pump light P and allowing the signal light S to pass through; the isolator unit and the beam splitter are clamped together Between the two glass sheets 8A and 8B, and put into the magnetic ring 7 together; during use, the pigtail 1A is connected to the erbium-doped optical fiber, 1B is connected to the pump light source, 1C is connected to the communication optical fiber, and 1D is connected to the detector, such as figure 2 shown. The pump light is input from the pigtail 1B, and after being collim...

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Abstract

The invention is light-path mixer in optical communication field, in which wave-division multiplexer, optical isolator and spectral coupler are integrated, used in fibre-optical amplifier. In light-path direction, it in turn includes the first double fiber-optical ocillator whose output end face is pasted with WDM filtering piece, wedge-shape isolator composed of two double-fraction crystal wedgepieces and one Faraday rotation crystal, hexagon-section spectral prism and the second double fibre-optical collimator; and the wedge-shape isolator and the spectral prism can be clamped between two glass pieces and together placed in permangnet magnetic ring.

Description

technical field [0001] The invention belongs to optical devices in the technical field of optical communication, and in particular relates to an optical path integrated device. Background technique [0002] In optical fiber communication systems, in order to increase the transmission distance of optical signals, a large number of optical fiber amplifiers are needed, such as Erbium-doped fiber amplifiers (EDFA), and in optical fiber amplifiers, wavelength division multiplexers (WDM), optical Optical passive devices such as isolators (ISO) and split optical couplers (TAP). The wavelength division multiplexer couples the pump light and the signal light into the optical fiber of the amplifier; the optical isolator can prevent the influence of reflected light on the laser; the optical splitter takes a part of the pre-amplified or post-amplified signal for monitoring It is used to control the gain or display the amplified optical power of the signal. [0003] The erbium-doped fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/26G02B6/30G02B6/32G02B6/34H04J14/02
Inventor 曹明翠万助军罗风光
Owner HUAZHONG UNIV OF SCI & TECH
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