Highly flexible Nyquist pulse generation based on multi-wavelength control

Bingjian Zhang; Kan Wu; Tianzhu Zhang; Siqi Liu; Jianping Chen

doi:10.3788/COL202018.070001

Journals >Chinese Optics Letters >Volume 18 >Issue 7 >Page 070001 > Article

Chinese Optics Letters
Vol. 18, Issue 7, 070001 (2020)

Highly flexible Nyquist pulse generation based on multi-wavelength control

Bingjian Zhang, Kan Wu^*, Tianzhu Zhang, Siqi Liu, and Jianping Chen

Author Affiliations

Shanghai Institute for Advanced Communication and Data Science, State Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

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DOI: 10.3788/COL202018.070001 Cite this Article Set citation alerts

Bingjian Zhang, Kan Wu, Tianzhu Zhang, Siqi Liu, Jianping Chen. Highly flexible Nyquist pulse generation based on multi-wavelength control[J]. Chinese Optics Letters, 2020, 18(7): 070001 Copy Citation Text

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Abstract

By controlling the wavelength and power of multiple light sources, we have realized a highly flexible Nyquist pulse generation scheme, in which the pulse repetition frequency, pulse multiplication factor, waveform envelope shape, and duty cycle are all tunable. By modulating the 3.2 GHz RF signal, we experimentally generated Nyquist pulses with repetition rates of 6.4 GHz and 9.6 GHz, a rectangular wave with a duty cycle of 0.26, and a sawtooth wave with a duty cycle of 0.52.

Keywords

multi-wavelength Nyquist pulse optical frequency combs

\sum_{- \infty}^{\infty} sinc [π \cdot N \cdot Δ f (t - \frac{n}{Δ f})] \to \sum_{- \frac{N - 1}{2}}^{\frac{N - 1}{2}} δ (f - n Δ f) .

(1)

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t_{d} = Δ λ \times GDD (λ),

(2)

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Δ λ \times GDD = \frac{1}{N f_{m}} .

(3)

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{\begin{matrix} t_{d} \geq τ_{p} \\ N τ_{p} \leq \frac{1}{f_{m}} \end{matrix} .

(4)

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τ_{p} = \frac{2}{N_{0} f_{m}},

(5)

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V_{b} = \frac{2 V_{π}}{π} \arctan [- \frac{J_{0} (m)}{J_{1} (m)}],

(6)

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OBSR (dB) = 10 \log [\frac{J_{0} (m)}{J_{2} (m)}] .

(7)

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\frac{1}{f_{m}} ε = (N - 1) Δ λ \times GDD .

(8)

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Bingjian Zhang, Kan Wu, Tianzhu Zhang, Siqi Liu, Jianping Chen. Highly flexible Nyquist pulse generation based on multi-wavelength control[J]. Chinese Optics Letters, 2020, 18(7): 070001

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