Frequency-doubled triangular shape lightwave generation with a flexible modulation index

Jing Li; Ze Hao; Li Pei; Tigang Ning; Jingjing Zheng

doi:10.3788/COL201715.090603

Journals >Chinese Optics Letters >Volume 15 >Issue 9 >Page 090603 > Article

Chinese Optics Letters
Vol. 15, Issue 9, 090603 (2017)

Frequency-doubled triangular shape lightwave generation with a flexible modulation index

Jing Li^1、2、*, Ze Hao^1、2, Li Pei^1、2, Tigang Ning^1、2, and Jingjing Zheng^1、2

Author Affiliations

¹Key Lab of All Optical Network & Advanced Telecommunication Network of EMC, Beijing Jiaotong University, Beijing 100044, China

²Institute of Lightwave Technology, Beijing Jiaotong University, Beijing 100044, China

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DOI: 10.3788/COL201715.090603 Cite this Article Set citation alerts

Jing Li, Ze Hao, Li Pei, Tigang Ning, Jingjing Zheng. Frequency-doubled triangular shape lightwave generation with a flexible modulation index[J]. Chinese Optics Letters, 2017, 15(9): 090603 Copy Citation Text

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

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

Fig. 2. Relationship between the magnitude of

| J_{\pm n} (β) |

and the modulation index

β

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Fig. 3. Relationship between the bias-induced phase shift

φ_{bias}

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 °

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Fig. 4. Generation of a 20 GHz triangular-shaped lightwave using a 10 GHz sinusoidal oscillator at

φ = 18 °

and

φ_{bias} = 264.5 °

. (a) The optical spectrum; (b) the generated 20 GHz triangular waveform; (c) the electrical spectrum after photodiode detection.

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Fig. 5. Simulation results (optical spectrum, temporal waveform, and electrical spectrum) of triangular-shaped light wave generation at different

φ

and

φ_{bias}

; (a) (b) (c)

φ = 75 °

and

φ_{bias} = 108.4 °

; (d) (e) (f)

φ = 124 °

and

φ_{bias} = 324.2 °

; (g) (h) (i)

φ = 150 °

and

φ_{bias} = 49.6 °

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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.

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Fig. 7. (Color online) Power ratio of two approaches at different modulation index values. Optical spectrum; the left axis stands for

I_{2 Ω} / I_{6 Ω}

in this work and the right axis stands for

I_{Ω} / I_{3 Ω}

in Ref. [14].

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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.

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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).

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

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Jing Li, Ze Hao, Li Pei, Tigang Ning, Jingjing Zheng. Frequency-doubled triangular shape lightwave generation with a flexible modulation index[J]. Chinese Optics Letters, 2017, 15(9): 090603

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