During the long-haul transmission of optical signals, the attenuation of the signals is high. Hence, the BA is required to ensure that the optical receiver can receive normal optical signals.
The BA2 amplifies the power of two-channel optical signals. Table 1 provides the functions and features of the BA2.
Table 1 Functions and features of the BA2
| Function and Feature | BA2 |
|---|
| Basic functions | Increases the launched optical power of the line board to 13-15 dBm or 15-18 dBm. As a result, when the G.652 optical fiber with a loss of 0.275 dB/km is used, the transmission distance can be 120 km, 130 km, or above. |
| Supporting the EDFA | Supports the automatic control of the laser temperature and optical power of the EDFA module. Supports the automatic monitoring of the input and output optical power of the EDFA module and query of the optical power of the EDFA module. Supports the protection function of the EDFA module. When no optical signals are received, the laser is automatically turned off. When optical signals are received, the laser is automatically turned on. |
| Performance events and alarms monitoring | Supports the reporting of the performance parameters of the laser. Reports various alarms and performance events, which facilitates the management and maintenance of the equipment. |
| Software upgrade | Supports the software upgrade and expansion without interrupting services. |
NOTICE:The wavelength of the optical signal transmitted to the BA2 must be within the range from 1530 nm to 1565 nm. Otherwise, the input optical signal cannot be amplified correctly. Hence, make sure that the output wavelength of the line board that is interconnected with the BA2 is within the required range.
NOTE:The BA2 provides the intelligent power adjustment (IPA) function. When the IPA function is enabled and no input signals are detected on the receive side of a line board, the pumping laser is turned off to prevent high laser power from damaging the eyes.
The number code that follows the board name in the bar code is the feature code of the board. The feature code of the BA2 indicates the output optical power of the optical interfaces.
Table 1 provides the relationship between the feature code of the BA2 and the output optical power.
Table 1 Relationship between the feature code of the BA2 and the output optical power
| Board | Feature Code | Output Optical Power |
|---|
| SSN1BA201 | 01 | Dual-channel optical power amplification: 14 dBm |
| SSN1BA202 | 02 | Dual-channel optical power amplification: 17 dBm |
| SSN1BA203 | 03 | Single-channel optical power amplification: 14 dBm |
| SSN1BA204 | 04 | Single-channel optical power amplification: 17 dBm |
| SSN1BA205 | 05 | Dual-channel optical power amplification: 14 dBm and 17 dBm |
The technical specifications of the BA2 include the parameters specified for optical interfaces, laser safety class, mechanical specifications, and power consumption.
Parameters Specified for Optical Interfaces
Table 1 lists the parameters specified for the optical interfaces of the BA2.
Table 1 Parameters specified for the optical interfaces of the BA2
| Parameter | Value |
|---|
| Input wavelength (nm) | 1530 to 1565 |
| Input optical power (dBm) | -6 to +3 |
| Output optical power (dBm) | 14 to 14.5 or 17 to 17.5 |
| Noise figure (dB) | < 6.5 |
Laser Safety Class
The safety class of the laser on the board is Class 1M. The maximum launched optical power of the optical interfaces is within the range from 10 dBm (10 mW) to 22.15 dBm (164 mW).
Mechanical Specifications
The mechanical specifications of the BA2 are as follows:
- Dimensions (mm): 25.4 (W) x 235.2 (D) x 261.4 (H)
- Weight (kg): 1.0
Power Consumption
The maximum power consumption of the BA2 at room temperature (25°C) is 19 W.
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