Figure 6
(a) Lateral cross-sections of the line beam at different wavelengths ranging from λ = 1530 nm to 1600 nm, covering the C and L bands. The measured \({\text{d}}\Psi /{\text{d}}\lambda\) was 0.34°/nm, resulting in a total scanning range (ΔΨ) of ~ 23.8°. (b) The measured throughput of the emitted main lobe. The throughput is maximum at a wavelength where the beam is emitted in the vicinity of Ψ = 0° at λ = 1590 nm and is minimum for the case of Ψ = ~ 15° at λ = 1550 nm.
