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Internal Modulated CATV Optic Transmitter

Internal Modulated CATV Optic Transmitter

Direct modulation will lead to high laser chirp (Laser's bias current is modulated by signal and the optical spectrum shifts and shakes). Laser chip will interact with dispersion effect caused by standard single mode fiber (SMF-28), which will generate serious distortion in the place of 1550nm. This kind of distortion will become more serious with the increase of transmission distance, bandwidth and channel number.

At present, international high performance 1550nm direct modulation has no obvious performance inferior while transmitting an analog and digital multiplexing full channel signal with transmission distance≤15Km.

Junpu JP1510DT is a 1550nm direct modulation optical transmitter with high index and AGC function. It adopts high linearity and low chirp DFB laser, built-in pre-distortion compensation and AGC, APC, ATC closed loop control, which improves the system index obviously. JP1510DT direct modulated optical transmitter can be used in WDM narrow-band multiplexing and IP/QAM.

JP1510DT optical transmitter: CATV wavelength.

Specifications of Internal Modulated CATV Optic Transmitter

Optic featureWavelength(nm)1548~1565JP1510DT
Output power(dBm)10Optional 3, 8, 10
Return loss(dB)≥55
optical fiber connector
RF featureWork bandwidth(MHz)45-862/1000Mhz
Input level(dBmV)20±2MGC
Return loss(dB)>16
Input impedance(Ω)75RF/INPUT
RF test(dB)0±1
Link featureTransmit channel
CNR(dB)≥50-1dBm receive
General featureNetwork management interface
RJ45, RS232Support I.E. & SNMP
Power supply(V)90~265 city power-48VDC optional

Features of Internal Modulated CATV Optic Transmitter

  • Low chirp, high linearity DFB laser, chirp compensation

  • Full-automatic OMI control, AGC & MGC

  • Intuitionistic modulation status display

  • Built-in dual back-up power supply, switch automatically

  • Casing temperature auto-control, ensure the long life of the laser

Application of Internal Modulated CATV Optic Transmitter

  • CATV Networks

  • Local Area Networks

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