Receiving-wave-adjustable optical module for fibers to home

Abstract

The invention provides a receiving-wave-adjustable optical module for fibers to the tome. The receiving-wave-adjustable optical module is provided with a base (1), an upper cover (4) and an optical signal selecting subassembly, wherein the optical signal selecting subassembly is positioned between the base (1) and the upper cover (4), is used for selecting optical signals with different wavelengths in the same fiber, and consists of a PCB (printed circuit board) and a fiber base pin aligning sleeve head (11); the fiber base pin aligning sleeve head (11) is used for aligning a fiber LC base pin and a PIN-TIA tube (7); a micro lens (5) and an adjustable filter (6) are sequentially arranged in the fiber base pin aligning sleeve head (11) from left to right; and a control circuit on the PCB (9) is respectively connected with a PIN tube (15) and a TIA tube (16) through gold wires. By using the receiving-wave-adjustable optical module for the fibers to the home, the transmission capacity and the transmission speed of a whole passive optical network based on wavelength division multiplexing are increased. The receiving-wave-adjustable optical module for the fibers to the home has the advantages that the optical module is low in cost and convenient to use, and is compatible with the existing optical receiving module.

Description

technical field [0001] The invention relates to an optical module for selectively receiving optical signals of different wavelengths on the same optical fiber of a passive optical network (PON) in a fiber-to-the-home (FTTH) solution, and belongs to the technical field of optical communication. Background technique [0002] With the rapid development of information technology, many FTTH solutions have gradually become research hotspots in the field of communication. The simplest is to place a fiber optic transceiver (commonly known as an optical modem) at the central office (telecom bureau) and the terminal (user) to achieve a fiber access rate of 100M or even 1G, but the topology of this method is pointless. On point. There are some problems with this method. As many users as there are at the remote end, there must be as many optical modules as there are at the local end. The cost is relatively high, and the occupation of optical fiber resources is also very alarming. To s...

AI Technical Summary

Problems solved by technology

Since the tunable laser diode (LD) is a temperature-controlled LD, the wavelength is more sensitive to temperature changes, so the accuracy requirements for temperature control are relatively high, but the accuracy cannot be obtained when the external temperature changes are very bad. Guarantee, which requires a compensation circuit to ensure its wavelength stability, and the wavelength tuning range is narrow and its application is mainly used for uplink transmission wavelength

There are a few foreign commercially available tunable optical wavelength filters with large size (such as the FFP-TF2 filter size of MOI company in the United States, 13.5mm×25.8mm×57.2mm) or poor performance (MEMS type filter has narrow tuning bandwidth and loss), and the price is too high to meet the commercial application requirements of the optical receiving module, which limits its application in the optical access module required by FTTH

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