Small optical device

Abstract

The invention provides a small optical device, which comprises an optical fiber head, wherein at least three optical fibers are arranged in the optical fiber head, and the plurality of optical fibersextend out of the first end of the optical fiber head; the second end of the optical fiber head is provided with a collimating lens, the end, which is away from the optical fiber head, of the collimating lens is provided with a first reflection transmission film, and the side, which is away from the collimating lens, of the first reflection transmission film is provided with a reflection device. According to the invention, the miniaturization of the optical device can be realized, and the small optical device can realize functions of optical isolation, light splitting and the like, can be usedfor wavelength monitoring and optical power monitoring of light beams at the same time, and can also be used for light splitting of light beams with different wavelengths.

Description

technical field [0001] The invention relates to an optical device, in particular to a small optical device with small volume and light splitting function. Background technique [0002] With the development of network communication, the data transmission speed of the optical fiber network is getting faster and faster, and the requirement for the capacity of the optical fiber network is also getting higher and higher. The existing optical fiber network transmission system uses a large number of various optical devices, such as isolators, beam splitters, depolarizers, etc. With the development of technology, various devices need to be used comprehensively to achieve the required functions. Therefore, the existing Fiber optic networks make extensive use of various optical hybrid devices. [0003] Existing optical hybrid devices are mainly devices with optical fibers at both ends. This is the most common optical device. The total length of this optical hybrid device exceeds 25 m...

AI Technical Summary

Problems solved by technology

Because this optical device needs to be equipped with two beam splitters, the device is bulky and the production cost of optical equipment is high, which is not conducive to the development of network technology

[0005] For this reason, the Chinese invention patent application with the publication number CN108089352A discloses an optoelectronic device, which is provided with three optical fibers in the fiber head, and a beam splitting crystal, a half-wave plate, and a focusing optical rotation assembly are arranged on one side of the fiber head As well as multiple devices such as angle wedges, the focusing and optical rotation components of this device include Faraday rotators and other devices, resulting in a large device size, which cannot meet the ever-decreasing use requirements of communication devices

[0006] In addition, because this device is an optical isolation device, that is, the light beam can only enter the device from a specific optical fiber before it can exit from the other two optical fibers. If it enters the device from other optical fibers, the light beam cannot exit. Therefore, this The device can only be used in the scene where the optical signal transmission direction is unique. If the optical signal needs to be transmitted bidirectionally, this kind of optical device cannot be used, which leads to the limitation of the use scene of the optical device.

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