The 1550nm external modulation optical transmitter is designed primarily for fiber optic communication. Its major function is to transform electrical signals into optical signals and transmit them across optical fiber. Externally modulated optical transmitters have a working bandwidth of 1550 nm and depend on external modulation technology, which means they use an external modulator to change the intensity or other properties of an optical signal in order to send an electrical signal. External modulation technology is more adaptable and efficient than direct modulation technology, making it suited for long-distance and high-speed data transfer.
PL1550G External Modulation Optical Transmitter has a bandwidth of 47MHz to 1002MHz and uses an imported low-noise DFB laser with a high linear LiNbO3 external modulator. An excellent pre-distortion circuit ensures the best CTB and CSO when the CNR is of high level. PL1550G 1550nm External Modulation Optical Transmitter (Low Cost Type ) has excellent performance that is the ideal choice for long-distance transmission and large area covered local networks.
SPECIFICATIONS
| Parameter | Unit | Value | Remark |
| Operating Wavelength | nm | 1540~1563 | Compatible with ITU wavelength |
| Output Port | / | 1/2 | |
| Output Power per Port | dBm | 7/8/9/10 | 1dBm/step, max 2*5dBm |
| Laser Linewidth | MHz | 0.35 | |
| SMSR | dB | 45~50 | |
| RIN | dB/Hz | -160 | RINÂ (20~1002MHz) |
| Optical Return Loss | dB | 50 | |
| Fiber Connector | / | SC/APC | FC/APC, LC/APCÂ optional |
| Operating Bandwidth | MHz | 47~1002 | |
| Input Level | dBμV | 75~85 | AGC |
| Flatness | dB | ±0.75 | 47~1002MHz |
| Return Loss | dB | 16 | |
| Input Impedance | Ω | 75 | |
| RF connector | / | FÂ type | |
| CNR1 | dB | ≥52.0 | TX to RX directly, Rx 0dBm, PAL-D/59CH |
| CNR2 | dB | ≥50.0 | Fiber 65km, Rx 0dBm,PAL-D/59CH |
| CTB | dB | ≥65 | |
| CSO | dB | ≥65 | |
| SBS Suppress | dBm | 13~19 | Â 0.1dBm/step |
| Power Supply | Vac | 90~265 | |
| Vdc | -72~-36 | ||
| Power Consumption | W | 60 | Dual Power Supply, Â 1+1 standby |
| Operating Temperature | ℃ | -5~+65 | |
| Storage Temperature | ℃ | -40~+85 | |
| Operating Relative Humidity | % | 5~95 | |
| Dimension | mm | 440*483*44 | D*W*H |
| Weight | Kg | 7.4 |
PL1550T 1550nm external modulation optical transmitter is made up of an external modulator, DFB laser, laser control circuit, optical modulator, modulation control circuit, microprocessor, pre-distortion circuit, photodetector, RF signal attenuator, amplifier, power supply, and other components.
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