Iterative Configuration of Programmable Unitary Converter Based on Few-Layer Redundant Multiplane Light Conversion

Taguchi, Yoshiharu; Wang, Yunzhuo; Tanomura, Ryota; Tanemura, Takuo; Ozeki, Yasuyuki

doi:10.1103/physrevapplied.19.054002

Cited by 11 publications

(2 citation statements)

References 43 publications

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“…This higher degree of control conceptually allows one to perform more demanding tasks, such as implementing arbitrary unitary transformations between the input and output modes of the MMF. This is similar to the freedom given by methods such as multi-plane light conversion (MPLC) [53,54], where it has been shown that N 2 phase shifters may be programmed to perform arbitrary transformations, even when they are not independent [55,56].…”

Section: Number Of Actuatorsmentioning

confidence: 60%

Tutorial: How to build and control an all-fiber wavefront modulator using mechanical perturbations

Shekel,

Sulimany,

Resisi

et al. 2024

J. Phys. Photonics

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Multimode optical fibers support the dense, low-loss transmission of many spatial modes, making them attractive for technologies such as communications and imaging. However, information propagating through multimode fibers is scrambled, due to modal dispersion and mode mixing. This is usually rectified using wavefront shaping techniques with devices such as spatial light modulators. Recently, we demonstrated an all-fiber system for controlling light propagation inside multimode fibers using mechanical perturbations, called the fiber piano. In this tutorial we explain the design considerations and experimental methods needed to build a fiber piano, and review applications where fiber pianos have been used.

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Section: Number Of Actuatorsmentioning

confidence: 60%

Tutorial: How to build and control an all-fiber wavefront modulator using mechanical perturbations

Shekel,

Sulimany,

Resisi

et al. 2024

J. Phys. Photonics

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show abstract

“…Another way is to first obtain a complete model of the programmable interferometer as a function of control parameters. This allows one to subsequently perform control optimization on a computer, without additional measurements [14,15]. The direct approach to reconstruction of the programmable interferometer model face the computationally intensive numerical optimization [16].…”

Section: Introductionmentioning

confidence: 99%

Fast reconstruction of programmable interferometers with intensity-only measurements

Bantysh,

Chernyavskiy,

Fldzhyan

et al. 2023

Laser Phys. Lett.

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Programmable linear optical interferometers are promising for classical and quantum applications. Their integrated design makes it possible to create more scalable and stable devices. To use them in practice, one has to reconstruct the whole device model taking the manufacturing errors into account. The inability to address individual interferometer elements complicates the reconstruction problem. A naive approach is to train the model via some complex optimization procedure. A faster optimization-free algorithm has been recently proposed (Bantysh et al 2023 Opt. Express 31 16729–42). However, it requires the full transfer matrix tomography while a more practical setup measures only the fields intensities at the interferometer output. In this paper, we propose the modification of the fast algorithm, which uses additional set of interferometer configurations in order to reconstruct the model in the case of intensity-only measurements. We show that it performs slightly worse than the original fast algorithm but it is more practical and still does not require intensive numerical optimization.

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The Goldilocks principle of learning unitaries by interlacing fixed operators with programmable phase shifters on a photonic chip

Zelaya,

Markowitz,

Miri

2024

Sci Rep

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Programmable photonic integrated circuits represent an emerging technology that amalgamates photonics and electronics, paving the way for light-based information processing at high speeds and low power consumption. Programmable photonics provides a flexible platform that can be reconfigured to perform multiple tasks, thereby holding great promise for revolutionizing future optical networks and quantum computing systems. Over the past decade, there has been constant progress in developing several different architectures for realizing programmable photonic circuits that allow for realizing arbitrary discrete unitary operations with light. Here, we systematically investigate a general family of photonic circuits for realizing arbitrary unitaries based on a simple architecture that interlaces a fixed intervening layer with programmable phase shifter layers. We introduce a criterion for the intervening operator that guarantees the universality of this architecture for representing arbitrary $$N \times N$$ N × N unitary operators with $$N+1$$ N + 1 phase layers. We explore this criterion for different photonic components, including photonic waveguide lattices and meshes of directional couplers, which allows the identification of several families of photonic components that can serve as the intervening layers in the interlacing architecture. Our findings pave the way for efficiently designing and realizing novel families of programmable photonic integrated circuits for multipurpose analog information processing.

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Iterative Configuration of Programmable Unitary Converter Based on Few-Layer Redundant Multiplane Light Conversion

Cited by 11 publications

References 43 publications

Tutorial: How to build and control an all-fiber wavefront modulator using mechanical perturbations

Tutorial: How to build and control an all-fiber wavefront modulator using mechanical perturbations

Fast reconstruction of programmable interferometers with intensity-only measurements

The Goldilocks principle of learning unitaries by interlacing fixed operators with programmable phase shifters on a photonic chip

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