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HT1500AC (CATV wavelength)
HT1500AU (ITU standard wavelength)
Direct Modulated 1550nm AGC Fiber Optical Transmitter
Huatai HT1500A is a 1550nm direct modulation fiber 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. HT1500A direct modulated 1550nm fiber optical transmitter can be used in FTTx (≤10Km) of second-grade service area (Sub-HE), also can be used in WDM narrow-band multiplexing and IP/QAM.
HT1500AC Fiber optical transmitter: CATV wavelength.HT1500AU Fiber optical transmitter: ITU standard wavelength.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.Product features:1. Low chirp, high linearity DFB laser, chirp compensation.
2. Dual module RF driver , high efficient laser pre-distortion adjustment.
3. Full-automatic OMI control, AGC & MGC.
4. Intuitionistic modulation status display.
5. Built-in dual back-up power supply, switch automatically .
6. Casing temperature auto-control, ensure the long life of the laser.
Technical Index:
| Performance | Index | Supplement | ||
| Optic feature | Wavelength | (nm) | 1548~1563 | HT1500AC: CATV wavelength |
| 1530~1563 | HT1500AU: ITU standard wavelength | |||
| Linewidth | (MHz) | ≤1 | FWHM | |
| Side mode suppression ratio | (dB) | ≥45 | SMSR | |
| Extinction ratio | (dB) | ≥20 | XP | |
| Equivalent noise intensity | (dB/Hz) | ≤-160 | RIN (20~1000MHz) | |
| Output power | (dBm) | 6 | 3, 10 Options | |
| Return loss | (dB) | ≥55 | ||
| optical fiber connector | FC/APC | Optional SC/APC | ||
| RF feature | Work bandwidth | (MHz) | 45-862 | |
| Input level | (dBmV) | 20±2 | MGC | |
| Flatness | (dB) | ≤±0.75 | 45~862MHz | |
| Return loss | (dB) | >16 | ||
| Input impedance | (Ω) | 75 | RF/INPUT | |
| RF test | (dB) | 0±1 | ||
| Link feature | Transmit channel | PAL-D/60CH | NTSC/80CH | |
| CNR | (dB) | ≥50 | -1dBm receive | |
| CTB | (dB) | ≤-63 | ||
| CSO | (dB) | ≤-57 | ||
| SBS restrain | (dBm) | ≥17 | ||
| General feature | Network management interface | RJ45, RS232 | Support I.E. & SNMP | |
| Power supply | (V) | 90~265city power | -48VDC optional | |
| Power Consume | (W) | ≤50 | Single power works | |
| Work temp. | (°C) | -5~65 | Machine temp. control automatically | |
| Storage temp. | (°C) | -40~85 | ||
| Operating relative humidity | (%) | 5~95 | ||
| Size (W)x(D)x(H) | 19×10×1.75 ( " ) 483×254×44 ( mm ) | |||
1550nm Direct Modulated AGC Fiber Optical Transmitter HT1500A