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High-speed silicon Michelson interferometer modulator and streamlined IMDD PAM-4 transmission of Mach-Zehnder modulators for the 2 μm wavelength band

High-speed silicon Michelson interferometer modulator and streamlined IMDD PAM-4 transmission of Mach-Zehnder modulators for the 2 μm wavelength band
High-speed silicon Michelson interferometer modulator and streamlined IMDD PAM-4 transmission of Mach-Zehnder modulators for the 2 μm wavelength band
We demonstrate high-speed silicon modulators optimized for operating at the wavelength of 2 μm. The Mach-Zehnder interferometer (MZI) carrier-depletion modulator with 2 mm phase shifter has a single-arm modulation efficiency (Vπ ·Lπ) of 2.89 V·cm at 4 V reverse bias. Using a push-pull configuration it operates at a data rate of 25 Gbit/s OOK with an extinction ratio of 6.25 dB. We also proposed a mathematically-analysed streamlined IMDD PAM-4 scheme and successfully demonstrated a 25 Gbit/s datarate PAM-4 with the same 2 mm modulator. A Michelson interferometer carrier-depletion modulator with 0.5 mm phase shift length has also been shown with modulation efficiency (Vπ ·Lπ) of 1.36 V·cm at 4 V reverse bias and data rate of 20 Gbit/s OOK. The Michelson interferometer modulator performs similarly to a Mach-Zehnder modulator with twice the phase shifter length.
Fiber optic communications, Hollow core fibers, Optical signal to noise ratio, Photonic bandgap fibers, Silicon modulators, Space division multiplexing
1094-4087
14438-14451
Cao, Wei
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Liu, Shenghao
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Littlejohns, Callum G.
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Thomson, David J.
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Nedeljković, Miloš
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Zhang, Weiwei
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Li, Ke
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Banakar, Mehdi
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Tran, Ying
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Yan, Xingzhao
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Du, Han
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Ren, Zhengqi
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Gardes, Frederic
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Reed, Graham T.
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Mashanovich, Goran Z.
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Cao, Wei
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Liu, Shenghao
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Littlejohns, Callum G.
d2837f04-0a83-4bf9-acb2-618aa42a0cad
Thomson, David J.
17c1626c-2422-42c6-98e0-586ae220bcda
Nedeljković, Miloš
b64e21c2-1b95-479d-a35c-3456dff8c796
Zhang, Weiwei
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Li, Ke
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Banakar, Mehdi
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Tran, Ying
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Yan, Xingzhao
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Du, Han
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Ren, Zhengqi
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Gardes, Frederic
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Reed, Graham T.
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Mashanovich, Goran Z.
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Cao, Wei, Liu, Shenghao, Littlejohns, Callum G., Thomson, David J., Nedeljković, Miloš, Zhang, Weiwei, Li, Ke, Banakar, Mehdi, Tran, Ying, Yan, Xingzhao, Du, Han, Ren, Zhengqi, Gardes, Frederic, Reed, Graham T. and Mashanovich, Goran Z. (2021) High-speed silicon Michelson interferometer modulator and streamlined IMDD PAM-4 transmission of Mach-Zehnder modulators for the 2 μm wavelength band. Optics Express, 29 (10), 14438-14451. (doi:10.1364/OE.418285).

Record type: Article

Abstract

We demonstrate high-speed silicon modulators optimized for operating at the wavelength of 2 μm. The Mach-Zehnder interferometer (MZI) carrier-depletion modulator with 2 mm phase shifter has a single-arm modulation efficiency (Vπ ·Lπ) of 2.89 V·cm at 4 V reverse bias. Using a push-pull configuration it operates at a data rate of 25 Gbit/s OOK with an extinction ratio of 6.25 dB. We also proposed a mathematically-analysed streamlined IMDD PAM-4 scheme and successfully demonstrated a 25 Gbit/s datarate PAM-4 with the same 2 mm modulator. A Michelson interferometer carrier-depletion modulator with 0.5 mm phase shift length has also been shown with modulation efficiency (Vπ ·Lπ) of 1.36 V·cm at 4 V reverse bias and data rate of 20 Gbit/s OOK. The Michelson interferometer modulator performs similarly to a Mach-Zehnder modulator with twice the phase shifter length.

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Submitted date: 24 December 2020
Accepted/In Press date: 17 March 2021
Published date: 28 April 2021
Keywords: Fiber optic communications, Hollow core fibers, Optical signal to noise ratio, Photonic bandgap fibers, Silicon modulators, Space division multiplexing

Identifiers

Local EPrints ID: 449251
URI: http://eprints.soton.ac.uk/id/eprint/449251
ISSN: 1094-4087
PURE UUID: f79f8eaf-35e5-46b8-92b2-7684aa6ba8bd
ORCID for Wei Cao: ORCID iD orcid.org/0000-0003-1431-7060
ORCID for Miloš Nedeljković: ORCID iD orcid.org/0000-0002-9170-7911
ORCID for Zhengqi Ren: ORCID iD orcid.org/0000-0003-1877-893X

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Date deposited: 20 May 2021 16:32
Last modified: 16 Sep 2021 01:59

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Contributors

Author: Wei Cao ORCID iD
Author: Shenghao Liu
Author: Weiwei Zhang
Author: Ke Li
Author: Mehdi Banakar
Author: Ying Tran
Author: Xingzhao Yan
Author: Han Du
Author: Zhengqi Ren ORCID iD
Author: Frederic Gardes
Author: Graham T. Reed

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