Measurement of Complex Waveforms in Wide Wavelength Range by Using Wavelength-Swept Light Source and Linear Optical Sampling
Summary :
This paper describes a method to evaluate the modulated waveforms output by a high-speed external phase modulator over a wide wavelength range by using linear optical sampling (LOS) and a wavelength-swept light source. The phase-modulated waveform is sampled by LOS together with the reference signal before modulation, and the modulation waveform is observed by removing the phase noise of the light source extracted from the reference signal. In this process, the frequency offset caused by the optical-path length difference between the measurement and reference interferometers is removed by digital signal processing. A pseudo-random binary-sequence modulated signal is observed with a temporal resolution of 10ps. We obtained a dynamic range of ∼40dB for the measurement bandwidth of 10 nm. When the measurement bandwidth is expanded to entire C-Band (∼35nm), the dynamic ranges of 37∼46dB were observed, depending on the wavelengths. The measurement time was sub-seconds throughout the experiment.
- Publication
- IEICE TRANSACTIONS on Communications Vol.E105-B No.7 pp.797-804
- Publication Date
- 2022/07/01
- Publicized
- 2021/12/28
- Online ISSN
- 1745-1345
- DOI
- 10.1587/transcom.2021EBP3132
- Type of Manuscript
- PAPER
- Category
- Fiber-Optic Transmission for Communications
Authors
Sougo SHIMIZU
Shimane University
Chao ZHANG
Shimane University
Fumihiko ITO
Shimane University
Keyword
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Sougo SHIMIZU, Chao ZHANG, Fumihiko ITO, "Measurement of Complex Waveforms in Wide Wavelength Range by Using Wavelength-Swept Light Source and Linear Optical Sampling" in IEICE TRANSACTIONS on Communications,
vol. E105-B, no. 7, pp. 797-804, July 2022, doi: 10.1587/transcom.2021EBP3132.
Abstract: This paper describes a method to evaluate the modulated waveforms output by a high-speed external phase modulator over a wide wavelength range by using linear optical sampling (LOS) and a wavelength-swept light source. The phase-modulated waveform is sampled by LOS together with the reference signal before modulation, and the modulation waveform is observed by removing the phase noise of the light source extracted from the reference signal. In this process, the frequency offset caused by the optical-path length difference between the measurement and reference interferometers is removed by digital signal processing. A pseudo-random binary-sequence modulated signal is observed with a temporal resolution of 10ps. We obtained a dynamic range of ∼40dB for the measurement bandwidth of 10 nm. When the measurement bandwidth is expanded to entire C-Band (∼35nm), the dynamic ranges of 37∼46dB were observed, depending on the wavelengths. The measurement time was sub-seconds throughout the experiment.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.2021EBP3132/_p
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@ARTICLE{e105-b_7_797,
author={Sougo SHIMIZU, Chao ZHANG, Fumihiko ITO, },
journal={IEICE TRANSACTIONS on Communications},
title={Measurement of Complex Waveforms in Wide Wavelength Range by Using Wavelength-Swept Light Source and Linear Optical Sampling},
year={2022},
volume={E105-B},
number={7},
pages={797-804},
abstract={This paper describes a method to evaluate the modulated waveforms output by a high-speed external phase modulator over a wide wavelength range by using linear optical sampling (LOS) and a wavelength-swept light source. The phase-modulated waveform is sampled by LOS together with the reference signal before modulation, and the modulation waveform is observed by removing the phase noise of the light source extracted from the reference signal. In this process, the frequency offset caused by the optical-path length difference between the measurement and reference interferometers is removed by digital signal processing. A pseudo-random binary-sequence modulated signal is observed with a temporal resolution of 10ps. We obtained a dynamic range of ∼40dB for the measurement bandwidth of 10 nm. When the measurement bandwidth is expanded to entire C-Band (∼35nm), the dynamic ranges of 37∼46dB were observed, depending on the wavelengths. The measurement time was sub-seconds throughout the experiment.},
keywords={},
doi={10.1587/transcom.2021EBP3132},
ISSN={1745-1345},
month={July},}
Copy
TY - JOUR
TI - Measurement of Complex Waveforms in Wide Wavelength Range by Using Wavelength-Swept Light Source and Linear Optical Sampling
T2 - IEICE TRANSACTIONS on Communications
SP - 797
EP - 804
AU - Sougo SHIMIZU
AU - Chao ZHANG
AU - Fumihiko ITO
PY - 2022
DO - 10.1587/transcom.2021EBP3132
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E105-B
IS - 7
JA - IEICE TRANSACTIONS on Communications
Y1 - July 2022
AB - This paper describes a method to evaluate the modulated waveforms output by a high-speed external phase modulator over a wide wavelength range by using linear optical sampling (LOS) and a wavelength-swept light source. The phase-modulated waveform is sampled by LOS together with the reference signal before modulation, and the modulation waveform is observed by removing the phase noise of the light source extracted from the reference signal. In this process, the frequency offset caused by the optical-path length difference between the measurement and reference interferometers is removed by digital signal processing. A pseudo-random binary-sequence modulated signal is observed with a temporal resolution of 10ps. We obtained a dynamic range of ∼40dB for the measurement bandwidth of 10 nm. When the measurement bandwidth is expanded to entire C-Band (∼35nm), the dynamic ranges of 37∼46dB were observed, depending on the wavelengths. The measurement time was sub-seconds throughout the experiment.
ER -
English
