Compact intensive wavelength division multiplexer used for fiber optic communication transmission system

Abstract

The invention relates to a compact intensive wavelength division multiplexer used for a fiber optic communication transmission system. The wavelength division multiplexer comprises a single-fiber collimator, film filters, an optical glass substrate and an encapsulation shell; the single-fiber collimator and the film filters are orderly arranged on the optical glass substrate to be overall encapsulated in the encapsulation shell; the single-fiber collimator comprises a multi-wave optical collimator and single-wave optical collimators; the film filters are parallelly arranged on the optical glass substrate in two rows; one row of film filters are in staggered arrangement with the other one row of corresponding film filters along the optical path; the single-wave optical collimators are fixedat the outer side of each film filter in one to one correspondence; and, an optical fiber port is arranged on the encapsulation shell. By optimizing the internal structure and designing the parameterof the optical path device, the encapsulation volume is not limited by the multiplexed cascade structure of the existing DWDM (Dense Wavelength Division Multiplexing) module product; the encapsulation volume is significantly reduced; and thus, the product is more adaptive to different environments.

Description

technical field [0001] The invention belongs to the field of wired optical fiber communication, relates to a channel device for wavelength division multiplexing / demultiplexing in optical signal transmission process, in particular to a compact dense wavelength division multiplexer for optical fiber communication transmission system. Background technique [0002] With the development of optical communication technology, the trend of optical communication devices is gradually dense and miniaturized. A wavelength division multiplexer is an optical communication device used to combine a series of optical signals carrying information but with different wavelengths into one beam, or to separate a received beam of optical signals containing different wavelengths. The wavelength division multiplexer is used in the field of optical fiber line transmission of telecom operators, which can fully tap the bandwidth resources of optical fiber, realize the expansion and upgrading of the exis...

AI Technical Summary

Problems solved by technology

[0003] Existing wavelength division multiplexers generally adopt the technical process of cascading thin-film filters (taking eight-wavelength dense wavelength division multiplexers as an example). In order to realize the multiplexing / demultiplexing function of eight wavelengths, eight DWDM single channels are required The device is cascaded, and the cascading method is that the COM port of the device is welded in series with the R port, which will result in a large package size, and the size of the shell will reach 100×80×10mm, which greatly limits the promotion and application of this product.

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