Table 1 Characteristics of the proposed FSFI-based ranging system

Central wavelength of sweeping

1552 nm

Output power

230 μW

Minimum detectable echo power

0.043fW

Swept bandwidth

200 GHz

Stand-off distance

Hundreds of meters

Precision

3σ = 0.2 mm @152 m

Relative precision

1.3 × 10^–6

Actual resolution

1.1 mm

Sweeping frequency

 ~ 10 Hz