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New FTTH 1010AGC-1550 Optical Fiber Transmitter 1550nm CATV Optical Transmitter With SC/APC Connector RF Input With LCD Display

Model No.: 1010Agc-bo-1550, direct modulation fiber optic transmitter with agc

Working wavelength: 1550 20 20 (nm)

Optical output power: 3 10 10 (mw)

Type of optical connector: sc/apc/apc

Total power consumption: 2.5 (w)

Functions and types of optical transmitters

The function of the digital optical transmitter is to convert the digital base charged signal output by the electrical terminal into optical signal, and effectively inject it into the fiber optic line with coupling technology.

The electrical/optical conversion is performed by modulating the light source with the digital electrical signal transport information.

Modulation is divided into direct modulation and external modulation.

The characteristic parameters of the modulated light source include power, amplitude, frequency and phase.

Direct modulation of light intensity (power) is widely used in practical fiber optic communication systems.

The function of the optical transmitter is to convert the tv am rf signal sent from the front into an optical signal, and transmit the optical signal remotely through the optical fiber.

According to different operating frequencies, optical transmitters are divided into two categories: a and b:

Class a: optical transmitter refers to the optical transmitter transmitting 59 PAL-D analog television signals in the frequency range of 47 mhz 550 mhz and digital modulation signals in the frequency range of 550 ~ 750 (862) mhz;

Class b: Optical transmitter refers to an optical transmitter that transmits 84 PAL-D analog tv signals in the frequency range of 47 mhz 750 mhz.

According to different modulation modes, optical transmitters are divided into frequency modulation, amplitude modulation and digital modulation.

Currently, the most widely used is the multi-channel am optical transmitter, which is divided into direct modulation and external modulation.

1.1.1310nm optical transmitter 1310nm wavelength laser outputs, which generally adopts direct intensity modulation technology, and its central component is dfb laser module; In addition, there are power supply, laser bias circuit, laser slow start circuit, distortion compensation and drive circuit, power control and cooling control circuit, overload protection and overdrive protection circuit, optical detection circuit, etc.

In the optical direct modulation transmitter, the rf signal directly conducts the laser after rf amplification, electronic attenuation and predistortion compensation

2. Application of 1550nm external modulation catv transmitter optical fiber transmission system, whether digital or analog, its important development goal is how to extend the transmission distance of the main line, or let the optical fiber go deep into the user area as much as possible, So as to realize the optical fiber for the road or optical fiber for the house. In the specific design of the optical system, there are two systems to choose, namely the 1310nm system and the 1550nm system, whose system must be selected is generally considered from the aspects of the technical indicators required by the system, system cost, system reliability, network flexibility and so on