Z-shaped multiplexer for wavelength divisions

Abstract

A Z shape wavelength split multiplex machine includes a middle block, an input end and multiple output ends, in which, the input end has a first casing tube and a collimator set in the casing tube. Every output end has a second casing tube, a filter plate and a collimator and the filter plate and the collimator are in the second casing tube. This invented Z shape wavelength splitter can avoid deflection angle generated between the collimator and filter plate to reduce wavelength deflection at frequency band center resulted from temperature change, and reduce cloage of refractive transition lens and glass casing rings.

Description

technical field [0001] The invention relates to a wavelength division multiplexer, in particular to a zigzag wavelength division multiplexer. Background technique [0002] Figure 1A A perspective view of a known wavelength division multiplexer is briefly shown. U.S. Patent No. 5,859,717 discloses a known "Z" shape wavelength division multiplexer (zigzag wavelength division multiplexer), such as Figure 1A shown. The known zigzag wavelength division multiplexer has a housing 1, and a support frame 2 and a first 3, second 4, third 5, fourth 6, fifth 7 and the first 3 are arranged in the housing 1. Six collimators8. A first 9, a second 10, a third 11 and a fourth filter 12 are arranged in the support frame 2, and the multi-band collimated light beam (multi-channel collimated light) emitted by the first collimator 3 generally takes an incident angle incident on the first filter 9. Generally, the angle of incidence is in the range of about 5° to 10° and preferably 7°. In ad...

AI Technical Summary

Problems solved by technology

However, the spacer 13 can only avoid the length change of the collimator due to thermal expansion and contraction, but cannot avoid the tilt angle between the collimator and the filter.

Therefore, when the adhesive 14 expands with heat and contracts with cold, causing a deflection angle between the collimator and the filter, it will cause problems such as band center wavelength shift and optical loss.

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