High-resolution spectral response measurement based on single sideband modulation

Dengcai Yang; Lingge Feng; Feng Yang; Yunxin Wang

doi:10.1117/12.2691429

1 August 2023 High-resolution spectral response measurement based on single sideband modulation

Dengcai Yang, Lingge Feng, Feng Yang, Yunxin Wang

Proceedings Volume 12752, Second International Conference on Optoelectronic Information and Computer Engineering (OICE 2023); 127520O (2023) https://doi.org/10.1117/12.2691429
Event: Second International Conference on Optoelectronic Information and Computer Engineering (OICE 2023), 2023, Hangzhou, China

Abstract

The spectral response of passive optical devices reveals the important characteristics of their materials and functions and is an essential evaluation index in the development, production and application of optical devices. In this paper, a broadband and high-resolution spectral response measurement method is proposed based on single sideband modulation technology. The optical carrier emitted by the tunable light source is incident on the dual parallel Mach Zehnder modulator (DPMZM), and the Microwave signal emitted by the frequency source is loaded on the modulator. Combined with the bias voltage and the hybrid couple, carrier suppression single sideband (CS-SSB) modulation is realized. The modulated signal is received by the photodetector after passing through the passive optical device under test, and frequency of the single sideband modulated optical signal can be swept through the frequency source. This signal passes through the optical beam splitter, and the spectral response of the passive optical device is measured by the balance detection of two signals. A broadband high-resolution spectral response measurement system is constructed in the experiment. The experimental results show that the spectral measurement resolution of the system reaches at least 5 MHz, and the measurement range is 1528-1568 nm. This measurement method combines a tunable light source with a single sideband microwave photon scanning frequency. The system structure is simple, the measurement accuracy is high, and the measurement range is large. It can realize the spectrum response measurement of passive optical devices such as narrow linewidth filters and wavelength division multiplexers.

Citation Download Citation

Dengcai Yang, Lingge Feng, Feng Yang, and Yunxin Wang "High-resolution spectral response measurement based on single sideband modulation", Proc. SPIE 12752, Second International Conference on Optoelectronic Information and Computer Engineering (OICE 2023), 127520O (1 August 2023); https://doi.org/10.1117/12.2691429

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KEYWORDS

Spectral response

Light sources

Signal detection

Single sideband modulation

Microwave radiation

Spectroscopy

Spectral resolution

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