Pump integrated optical device

Abstract

The invention discloses a pump integrated optical device comprising a first two-core glass pin, a first collimating optical lens, a gain flatness filter assembly, a second collimating optical lens, and a second two-core glass pin which are arranged in the inside sealed glass tube from left to right, and a metal outside sealed tube which is arranged outside the inside sealed glass tube. An isolator chipware is placed at the front end or the tail end of the gain flatness filter assembly. The first collimating optical lens and the second collimating optical lens are provided with filter membranes which can transmit signal light and reflex pump light. The first two-core glass pin comprises a first optical fiber, a second optical fiber, a first two-core capillary tube and a first glass tube. The second two-core glass pin comprises a third optical fiber, a fourth optical fiber, a second two-core capillary tube and a second glass tube. The first optical fiber, the second optical fiber, the third optical fiber and the fourth optical fiber are optical fibers after being processing in a beam expanding mode. The pump integrated optical device integrates the multiple functions of a wavelength division multiplexer, an isolator and a gain flatness filter.

Description

[0001] technical field [0002] The invention relates to an optical device, in particular to a double-pump integrated optical device. The device simultaneously has the functions of a wavelength division multiplexer, an isolator and a gain flattening filter. The invention belongs to the communication field. [0003] Background technique [0004] With the continuous growth of bearer service capacity, the deployment of 40G wavelength division system is imminent. During the long-distance transmission of optical signals in 40Gbit / sWDM system, in order to ensure the integrity of optical signals, the optical signals of each ITU-T channel need amplification, so that each ITU-T channel requires a small fiber amplifier. In order to optimize the internal layout of the small fiber amplifier and reduce the space size of the product, the volume of the small fiber amplifier needs to be further reduced to an ultra-small array fiber amplifier. The optical route of the existing optical fibe...

AI Technical Summary

Problems solved by technology

The optical route of the existing optical fiber amplifier part is the first wavelength division multiplexer 1, gain flattening filter, isolator, and the second wavelength division multiplexer. Four separate optical devices are spliced ​​together, such as Figure 1 As shown in the dotted box, there are three defects in the following aspects 1, 4 2. When splicing the optical path, there are more solder joints of the four separate optical devices, and the cumulative loss of the solder joints is relatively large, which affects the noise index of the optical fiber amplifier; 3. During the splicing process of the optical path , using four separate optical devices, the production efficiency is not high

Therefore, the optical fiber amplifiers in the prior art are relatively large in size and cannot meet the requirements of practical applications.

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