Fig. 1. Schematic diagram of a triangular-shaped light wave generator (spectra diagram inserted).

Fig. 2. Relationship between the magnitude of |J±n(β)| and the modulation index β.

Fig. 3. Relationship between the bias-induced phase shift φbias and the PS phase shift φ at different ranges: (a) 0°<φ<45°; (b) 45°<φ<90°; (c) 90°<φ<135°; (d) 135°<φ<180°.

Fig. 4. Generation of a 20 GHz triangular-shaped lightwave using a 10 GHz sinusoidal oscillator at φ=18° and φbias=264.5°. (a) The optical spectrum; (b) the generated 20 GHz triangular waveform; (c) the electrical spectrum after photodiode detection.

Fig. 5. Simulation results (optical spectrum, temporal waveform, and electrical spectrum) of triangular-shaped light wave generation at different φ and φbias; (a) (b) (c) φ=75° and φbias=108.4°; (d) (e) (f) φ=124° and φbias=324.2°; (g) (h) (i) φ=150° and φbias=49.6°.

Fig. 6. Generation of a 10 GHz triangular-shaped light wave using a 10 GHz sinusoidal oscillator in Ref. [14]. (a) The optical spectrum; (b) the generated 10 GHz triangular waveform; (c) the electrical spectrum after photodiode detection.

Fig. 7. (Color online) Power ratio of two approaches at different modulation index values. Optical spectrum; the left axis stands for I2Ω/I6Ω in this work and the right axis stands for IΩ/I3Ω in Ref. [14].

Fig. 8. Triangular-shaped light wave generation with different repetition rates (temporal waveform and corresponding electrical spectrum): (a)(b) 30 GHz; (c)(d) 40 GHz; (e)(f) 50 GHz.

Fig. 9. (a) Optical spectrum at the output of DP-MZM and (b) optical spectrum after the OI (the response of the OI is given by the dashed line).

Fig. 10. (a) Waveform of optical intensity; (b) zoom-in view (the ideal triangular-shaped waveform is given by the dashed line).