Silica-based PLC Type 32 x 32 Optical Matrix Switch

Sohma, S.; Watanabe, Toshio; Ooba, Naoki; Itoh, M.; Shibata, Tomohiro; Takahashi, Hiroshi

doi:10.1109/ecoc.2006.4801113

Cited by 57 publications

(32 citation statements)

References 3 publications

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“…Linear optical circuits lie at the heart of all of these protocols, and a single LPU device with the ability to arbitrarily 'dial-up' such operations promises to replace a multitude of existing and future prototype systems. In the near term, combining LPUs with existing higher efficiency sources and detectors will expand their capabilities, while in the mid-term, integration of these components [63,64] with larger low-loss circuits [65] will open up new avenues of research and application.…”

Section: Discussionmentioning

confidence: 99%

Universal linear optics

Carolan

Harrold

Sparrow

et al. 2015

Science

1,004

899

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Linear optics underpins tests of fundamental quantum mechanics and computer science, as well as quantum technologies. Here we experimentally demonstrate the longstanding goal of a single reprogrammable optical circuit that is sufficient to implement all possible linear optical protocols up to the size of that circuit. Our six-mode universal system consists of a cascade of 15 MachZehnder interferometers with 30 thermo-optic phase shifters integrated into a single photonic chip that is electrically and optically interfaced for arbitrary setting of all phase shifters, input of up to six photons and their measurement with a 12 single-photon detector system. We programmed this system to implement heralded quantum logic and entangling gates, boson sampling with verification tests, and six-dimensional complex Hadamards. We implemented 100 Haar random unitaries with average fidelity 0.999 ± 0.001. Our system is capable of switching between these and any other linear optical protocol in seconds. These results point the way to applications across fundamental science and quantum technologies.Photonics has been crucial in establishing the foundations of quantum mechanics [1], and more recently has pushed the vanguard of efforts in understanding new non-classical computational possibilities. Typical protocols involve nonlinear operations, such as the generation of quantum states of light through optical frequency conversion [2,3], or measurement-induced nonlinearities for quantum logic gates [4], together with linear operations between optical modes to implement core processing functions [5]. Encoding qubits in the polarisation of photons has been particularly appealing for the ability to implement arbitrary linear operations on the two polarisation modes using a series of wave plates [6]. For path encoding the same operations can be mapped to a sequence of beamsplitters and phase shifters. In fact, since any linear optical (LO) circuit is described by a unitary operator, and a specific array of basic two-mode operations is mathematically sufficient to implement any unitary operator on optical modes [7], it is theoretically possible to construct a single device with sufficient versatility to implement any possible LO operation up to the specified number of modes.Here we report the realisation of this longstanding goal with a six-mode device that is completely reprogrammable and universal for LO. We demonstrate the versatility of this universal LO processor (LPU) by applying it to several quantum information protocols, including tasks that were previously not possible. We im- * anthony.laing@bristol.ac.uk plement heralded quantum logic gates at the heart of the circuit model of LO quantum computing [4] and new heralded entangling gates that underpin the measurementbased model of LO quantum computing [8][9][10], both of which are the first of their kind in integrated photonics. We perform 100 different boson sampling [11][12][13][14][15] experiments and simultaneously realise new verification protocols. Finally, we use multi-p...

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Section: Discussionmentioning

confidence: 99%

Universal linear optics

Carolan

Harrold

Sparrow

et al. 2015

Science

1,004

899

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“…Suitable switch elements of compact size and low insertion loss are emerging (e.g., using MEMS technology [28]) and the use of multi-stage techniques has been validated experimentally (e.g., the thermo-optic 32 x 32 matrix switch [29]). Multi-stage switch architectures have also been proposed in the related area of on-chip optical interconnection [30].…”

Section: Applications and Conclusionmentioning

confidence: 99%

Efficient Implementation of Symmetric Multistage Repackable Networks

Chakrabarty

Collier

2010

2010 International Conference on Computational Intelligence and Communication Networks

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We revisited the problem of efficient implementation of large scale switching systems using repackable networks [16], which offer performance approaching that of strict sense nonblocking networks. In particular, we study repackable networks with more than three stages. Our method uses bypass path(s) for designing the repackable network to maintain path continuity while at repacking. This is essential if networks are not to be limited to time-slatted operations. We investigate the minimum number of bypass links required for different network sizes. The required minimum number of bypass links for a network depends on the number of links forming a rearrangement chain [2]. This paper shows minimum number of links required to complement a repackable and thereby demonstrate its attractive scaling properties. It also proposes some future applications where these network can be applicable.

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“…A great advantage of the PLC is long term stability due to absence of the mechanical components. With silica PLCs, multiport switches up to 32 Â 32 [1] have been reported, whose die size was as large as a 4-inch wafer. Silicon-based waveguides have strong optical confinement due to its large index contrast with the silica cladding, leading to more compact switch devices.…”

Section: Introductionmentioning

confidence: 99%

Multiport optical switches integrated on Si photonics platform

Suzuki

Cong

Tanizawa

et al. 2014

IEICE Electron. Express

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This paper reviews recent progress in integrated multiport optical switch, fabricated on silicon-on-insulator wafers. Typical topologies of multiport switch and the element switches are first described. Then, we review pioneering studies of the integrated multiport switches. We also describe feasible improvements, some of which will better fit the switch to a real use in telecommunication and some to enlarge the port count.

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Silica-based PLC Type 32 x 32 Optical Matrix Switch

Abstract: We have developed the first silica-based PLC type 32 x 32 optical matrix switch. The switch is the largest scale waveguide type switch yet reported, which has excellent optical characteristics with an average insertion loss of 6.6 dB.

Cited by 57 publications

References 3 publications

Universal linear optics

Universal linear optics

Efficient Implementation of Symmetric Multistage Repackable Networks

Multiport optical switches integrated on Si photonics platform

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