Figure 1
From: Photonic Generation of Triangular-shaped Waveform Based on External Modulation

(A) Schematic diagram of the proposed triangular-shaped waveform generator; (B) The corresponding spectrum diagram. (CW, continuous-wave laser; LO, local oscillator; DD-MZM, dual-drive Mach–Zehnder modulator; TA, tunable attenuator; PS, phase shifter; PA, power amplifier; PC, polarization controller; FBG, fiber Bragg grating; PD, Photodetector).