When designing an optical link, one of the factors to consider is the optical power budget. The power budget indicates the amount of light available to make a fiber optic connection, and it is the difference between the optical transmitter output power ( TX power ) and the receiver sensitivity ( Rx sensitivity ). A simple calculation is used to determine how much optical power, measured in dBm, is available.
Power Budget (dBm) = TX Power - RX Sensitivity
Tx power indicates the device's worst-case transmit power - the device is guaranteed to provide at least that much power. Rx sensitivity indicates the minimum amount of light required by the receiver to operate correctly.
| Modules Name |
TX Power |
RX Sensitivity |
Power Budget |
| TCF-142-S v2.3 |
-15 dBm |
-34 dBm |
19 dBm |
| TCF-142-S v3.1 |
-5 dBm |
-25 dBm |
20 dBm |
| TCF-142-M v2.1 |
-10 dBm |
-25 dBm |
15 dBm |
| TCF-142-M v3.1 |
-5 dBm |
-20 dBm |
15 dBm |
| TCF-90-S |
-5 dBm |
-24 dBm |
19 dBm |
| TCF-90-M |
-5 dBm |
-20 dBm |
15 dBm |