Top class 1550 External Modulation Optical Laser Transmitter (HT8500T)

Product Overview

Description

HT8500T is a series of Top-class 1550 external modulation optical laser transmitter achieving the highest standards of today. The whole-unit's optical source adopts narrow line width (Typ.=0.3MHz), low noise and continuous wave DFB laser, which is propitious to reduce dispersion effect. Adopting ITU standard wavelength, users can adjust and set the wavelength on the front panel within the range of ±200GHz (±1.6nm) as ±0.05nm stepping. HT8500T EM optic transmitter is applicable for the network upgrading and expansion of WDM system. The whole unit signal modulation adopts CATV special LiNbO3 external modulator of American JDS-U company and Huatai optimized control technology with independent intellectual property , so HT8500T EM optic transmitter can reach high index of back to back CNR ≥ 54dB, CTB ≤ -65dB, CSO ≤ -65dB, SBS: 13~19dBm continuous adjustable. The whole unit is equipped with perfect RS232 communication interface, SNMP network management, 1+1 back-up power supply , hot-plug function available, chassis temperature auto-control. All the optical port of EM optical transmitter can be installed in the front panel (The back panel is also available if needed).

 

HT8527T : 2 fiber output, each port ≥7.0dBm, CNR ≥ 54.0dB,SBS: 13~19dBm

 continuously adjustable,ITU wavelength adjustable.

 

HT8529T : 2 fiber output, each port ≥8.5dBm, CNR ≥ 54.0dB,SBS: 13~19dBm

continuously adjustable,ITU wavelength adjustable.

 

HT85210T : 2 fiber output, each port ≥10dBm, CNR ≥ 54.0dB,SBS: 13~19dBm

continuously adjustable,ITU wavelength adjustable.

 

HT85212T : 2 fiber output, each port ≥12dBm, CNR ≥ 54.0dB,SBS: 13~19dBm

continuously adjustable,ITU wavelength adjustable.

 

HT85213T : 2 fiber output, each port ≥13dBm, CNR ≥ 54.0dB,SBS: 13~19dBm

continuously adjustable,ITU wavelength adjustable

 

Product feature

1. Externally modulated technology for HT8500T optical laser transmitter, no laser chirp, low dispersion distortion, high extinction ratio, with excellent characteristic within 40~862MHz, used in the over-long trunk of large and medium sized cable television head-end.


2. 1+1 powers supply back , up hot-plug function available.


3. Narrow line width (Typ=0.3 MHz), low noise, and DFB continuous wave laser, be propitious to reduce dispersion effect.


4. The work bandwidth for HT8500T optic transmitter is up to 47~862MHz.


5. CNR ≥ 54dB and excellent CTB, CSO index.


6. SBS: 13~19dBm, continuous adjustable.


7. ITU standard wavelength adjustable , users can adjust and set the wavelength on the front panel with ±0.05nm stepping in the range of ±200GHz (±1.6nm), used in the network upgrading and expansion of WDM system.


8. AGC/MGC mode is optional at spot; OMI can be optimized at spot.


9. Perfect RS232 communicate interface.


10. Advanced SNMP network management function.


11. Casing temperature auto-control.

Main application

• Used in the over-long trunk and distribution net in the large and middle cable television central station head-end.

            Analogue digital hybrid transmission > 200Km (with dispersion compensation).

            Pure digital transmission (Without dispersion compensation) > 400Km,

                                                  (With dispersion compensation) >700Km.

• VAS in DWDM fiber CATV system


• CFG dispersion compensates system.

Technical index