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1550nm Direct Modulation will cause serious Laser Chirp Effect, which will lead the Laser Bias Current to be modulated by CATV signal, and the Optical Frequency will shift and jitter. The Chirp will cause serious Distortion in 1550nm. This Distortion will become more serious as the Increase of Transmission Distance, Transmission Bandwidth and the Number of Channels. Our device adopts High Linear & Low Chirp DFB Laser, on the basis of 1310nm Multi-Function Optical Transmitter, increasing the Predistortion Compensation and Chirp Compensation that will greatly improves the Transmission Index of the system. It can be used for 1550nm System Analog and Digital Multiplexed Multi-Channel Signals Optical Transmission within the range of 20Km.
█ We Choose ORTEL or AOI-1550nmITU Wavelength, with Semiconductor Refrigeration/Heating & Backlight Monitoring DFB Laser;
█ Main Control Circuit with computer control, LCD Working Status Display, Automatic Alarm until Self-Protection
█ The Electric Signal Amplifier adopts PDI GaAs Low Noise, High Gain and Large Dynamic Module, Its Inter-Cut CNR Features better than China National Standard.
█ High Efficiency Laser Predistortion Correction, Chirped Compensation Circuit, Effective Improvement of Nonlinear Distortion Index
█ Hot Pluggable Standby Power Supply Module, Anti Surge, Overvoltage and Overcurrent Protection, Anti Lightning Voltage≥6000V
█ Optical Transmission Carrier Bandwidth 47～862/1000MHz, Bandwidth Inside Flatness≤±0.75dB；
█ Option Type II Condition Monitoring Transponder guaranteed to meet China National Standard and Compatible with SCTAE HMS WEB Standards.
| Item | Performance Index | ||
| Optical Characteristics | Laser Wavelength | nm | 1550±10(or ITU Wavelength or User Required) |
| Laser Linewidth | MHz | ≤1 FWHM(△λ) | |
| SMSR | dB | ≥45 SMSR | |
| Equivalent Noise Intensity | dB/Hz | ≤-160 RIN (20～1000MHz) | |
| Extinction Ratio | dB | ≥20 | |
| Output Power | dBm | ≥10 | |
| Optical Return Loss | dB | ≥55 | |
| Optical Adapter | / | FC/APC or SC/APC | |
| RF Characteristics | Working Bandwidth | MHz | 47～862 or 1000 |
| Input Level | dBuV | 80±5, Transmission Channel≤60CH by 10lg60/n Append | |
| AGC Characteristics | dB | ±1 | |
| Flatness | dB | ≤±0.75 47-862/1000MHz | |
| Return Loss | dB | ＞16(47～550)MHz＞14[550～862/1000MHz | |
| Input Impedance | Ω | 75(RF/INPUT) | |
| RF Detection | dB | -20±1(Detection When Minimum Input Level) | |
| CNR | dB | ≥51(15Km Fiber Optic Link, 0dBm Receiving) | |
| CTB | dB | ≤-65(15Km Fiber Optic Link, 0dBm Receiving) | |
| CSO | dB | ≤-63(15Km Fiber Optic Link, 0dBm Receiving) | |
| General Characteristics | Network Management Port | / | RJ45(Support Web Browser&SNMP) |
| Power Supply/Consumption | V/W | 90～255/(Double Power Supply≤50) | |
| Working/Storage Temperature | ℃ | -20～55/-30～75 | |
| Working Relative Temperature | % | 5～95 | |
| Size | " | 19×10×1.75（W×D×H） | |
Product Name | Model | Functional Description |
direct modulation optical transmitter | HS15107D | RF80±5dBuv input，ITU 1550nm, ≥7,10dBm output；1U standard cabinet，dual module hot plug power supply，AC90～255V or DC-48V power supply，RJ45 standard network management system(support SNMP, WEB) |
HS15110D |
