A speckle enhanced prism spectrometer based on planar lightwave circuit chip

IF 2.2 3区物理与天体物理 Q2 OPTICS

Optics Communications Pub Date : 2025-03-07 DOI:10.1016/j.optcom.2025.131715

Mingqian Zhou, Haole Kong, Zhiming Zhang, Yanghui Li, Juan Kang, Lu Yin, Yi Li, Le Wang

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引用次数: 0

Abstract

We present a new spectrometer design which combines a conventional prism spectrometer with planar lightwave circuits (PLC) in this study. The PLC chip was integrated in front of the prism as a scattering medium to improve the spectral resolution. Interferences among different modes in the multimode waveguide create wavelength-dependent speckle patterns. Since the speckle patterns corresponding to different wavelengths are deterministic and unique, they can be utilized for wavelength identification after calibration. In addition, the spectral-spatial mapping through the prism further enhances the contrast of speckles, thereby improving the resolution and bandwidth. Compared with conventional prism spectrometers, the speckle-enhanced prism spectrometer incorporates both a scattering medium and a prism, enabling simultaneous high resolution and wide bandwidth. Moreover, the narrow output of the PLC can replace the slit in conventional spectrometers, further improving the optical efficiency to 40%. In demonstration experiments, the proposed spectrometer successfully measured multiple laser wavelengths and a broad band light source. The resolution of up to 5 pm over the wavelength range of 1525–1565 nm was achieved. This study paves the way for the development of high-resolution spectrometers with smaller volumes and higher optical efficiency.

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来源期刊

Optics Communications 物理-光学

CiteScore

5.10

自引率

8.30%

发文量

681

审稿时长

38 days

期刊介绍： Optics Communications invites original and timely contributions containing new results in various fields of optics and photonics. The journal considers theoretical and experimental research in areas ranging from the fundamental properties of light to technological applications. Topics covered include classical and quantum optics, optical physics and light-matter interactions, lasers, imaging, guided-wave optics and optical information processing. Manuscripts should offer clear evidence of novelty and significance. Papers concentrating on mathematical and computational issues, with limited connection to optics, are not suitable for publication in the Journal. Similarly, small technical advances, or papers concerned only with engineering applications or issues of materials science fall outside the journal scope.