Abstract

Due to the unique nature of offering minimal invasiveness and high spatial resolution simultaneously, multimode fibers (MMFs) are receiving significant attention in bio-imaging applications. While a spatial light modulator is typically used for controlling the wavefront of the light emitted from the MMF, it makes the system slow, bulky, and expensive. To solve this problem, in this work, we demonstrate the use of a chip-scale integrated optical phased array (OPA) for imaging through an MMF. A silicon OPA with 128 independent phase shifters is fabricated and combined with a 3D waveguide interface to generate speckle patterns at the MMF output. Using the generated speckles and the optical power detected by a bucket detector, we experimentally obtain fine 2D images of the target. From the point spread function analysis of the system, the number of resolvable points is derived to be 1007 points, which is much larger than the number of phase shifters.

Resolution limit of single-pixel speckle imaging using multimode fiber and optical phased array

Taichiro Fukui, Yoshiaki Nakano, and Takuo Tanemura
J. Opt. Soc. Am. B 38(2) 379-386 (2021)

Comparative analysis of speckle-based single-pixel imaging using uniform and non-redundant optical phased arrays

Taichiro Fukui, Kento Komatsu, Yoshiaki Nakano, and Takuo Tanemura
J. Opt. Soc. Am. A 39(12) 2325-2338 (2022)

Ghost imaging using a large-scale silicon photonic phased array chip

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Opt. Express 27(3) 3817-3823 (2019)

High frame-rate computational ghost imaging system using an optical fiber phased array and a low-pixel APD array

Chunbo Liu, Jingqiu Chen, Jiaxin Liu, and Xiang’e Han
Opt. Express 26(8) 10048-10064 (2018)

Simultaneous illumination and imaging based on a single multimode fiber

Zhenyu Ju, Zhenming Yu, Ziyi Meng, Ning Zhan, Lili Gui, and Kun Xu
Opt. Express 30(9) 15596-15606 (2022)