מושגי ליבה
A novel coherent transceiver architecture that enables both data transmission and optical identification, improving the overall security of the optical network.
תקציר
The content presents a coherent transceiver (C-TRX) architecture that can perform both data transmission and optical identification (OI) to enhance the security of optical networks.
Key highlights:
- OI using coherent optical frequency domain reflectometry (C-OFDR) allows identifying optical sub-systems by their unique Rayleigh backscattering pattern (RBP), without the need for additional devices.
- The proposed C-TRX architecture is similar to a conventional one, with minor modifications to enable switching between data transmission and OI modes.
- In OI mode, the C-TRX sends a frequency sweep to the target sub-system, detects the RBP, and compares it with the known signature to identify the sub-system.
- Simulations show that the OI can achieve a probability of false positive and false negative below 10^-10 in standard operating conditions, by tuning parameters like launch power, measurement time, and frequency sweep range.
- The reliability of OI improves as the frequency sweep range increases, with a weighted wrong identification below 10^-20 for a 50 GHz sweep range and SNR above 7 dB.
- The C-TRX can suspend data transmission for a short time (less than 0.1 ms) to perform OI, ensuring security without significantly impacting the data transmission.
סטטיסטיקה
The content includes the following key figures and metrics:
Signal-to-noise ratio (SNR) on the detected photocurrent, which can be increased by higher launch power or longer measurement time, but decreases with distance due to fiber attenuation.
Probability of false positive and false negative in optical identification, which can be reduced to below 10^-10 with an SNR of 30 dB and a 10 GHz frequency sweep range.
The reliability of optical identification, measured as weighted wrong identification, which can be below 10^-20 with a 50 GHz frequency sweep range and an SNR above 7 dB.
ציטוטים
"The reliability increases, i.e., the WWI decreases, when ∆F increases, with values below 10−20 for SNR ≥7dB with ∆F = 50 GHz."
"The results show that security is guaranteed in different scenarios by tuning the measure parameters, e.g., probability of false positive/negative below 10−20 suspending data transmission for less than 10−4s with C-TRX bandwidth of 25GHz, at a distance lower than 10km."