External modulation radio frequency electro-optical conversion integrated assembly

Abstract

The invention relates to the technical field of radio over fiber, and discloses an external modulation radio frequency electro-optical conversion integrated assembly. The device comprises a microwavechip unit, a laser unit, a coupling lens, a modulator unit, a temperature regulation and control unit and a control circuit unit, and the microwave chip unit is connected with the modulator unit through a microstrip line and provides radio frequency microwave signals for the modulator unit; The laser unit is sequentially connected with the coupling lens and the modulator unit and provides an optical signal for electro-optical conversion for the modulator unit; The modulator unit loads the radio frequency microwave signal into an optical signal to realize electro-optical conversion; Wherein thetemperature regulation and control unit is used for carrying out stable temperature control on the laser unit, and the control circuit unit is respectively connected with the temperature regulation and control unit, the laser unit and the modulator unit. According to the technical scheme, the cost, the size and the weight are greatly reduced, and the integration level, the expandability and the reliability are improved.

Description

technical field [0001] The invention relates to the technical field of optical radio frequency, in particular to an external radio frequency electro-optical conversion integrated assembly. Background technique [0002] With the development of optical fiber technology and radio frequency communication technology, radio over fiber (RoF) based on optical fiber transmission has been widely used. This technology modulates high-speed radio frequency analog signals onto optical signals. , to achieve high bandwidth, low loss and long-distance transmission of signals. At present, the RoF system based on RF analog signal modulation is generally built by discrete components or modules such as RF components, lasers, modulators, detectors, and related control circuits, and realizes signal interconnection and electrical connection through optical fibers, RF cables, and wires. Chinese patent application CN107800485A discloses an optical radio frequency analog transmission signal transceiv...

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Problems solved by technology

Chinese patent application CN107800485A discloses an optical radio frequency analog transmission signal transceiver, which is sequentially connected to a continuous wave laser, an optical intensity modulator, a modulation signal amplifier, and an optical path switch through an optical fiber, wherein the optical intensity modulator is connected to a radio frequency circuit through a radio frequency cable, This kind of transceiver system is bulky and heavy, and it is not easy to integrate and apply

The US patent application US2018031946A1 discloses a microwave photonic link implementation method based on an electro-optic modulator, which includes lasers, electro-optic modulators, photodetectors and other devices connected through optical fibers, but this system has a low degree of integration. There are still problems such as large size, poor stability, and difficulty in integration

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