Fabrication and demonstration of 1 × 8 silicon–silica multi-chip switch based on optical phased array

Katayose, Satomi; Hashizume, Yoshio; Itoh, M.

doi:10.7567/jjap.55.08rb01

Cited by 5 publications

(4 citation statements)

References 15 publications

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“…Another feasible 1 × N optical switch is based on a phased array illustrated in Fig. 13(b) [99] . The optical wave is first divided into multiple beams by the first star coupler.…”

Section: Multi-path Switchable Delay Linesmentioning

confidence: 99%

Integrated optical delay lines: a review and perspective [Invited]

Zhou

Wang

et al. 2018

Chin. Opt. Lett.

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Optical delay lines (ODLs) are one of the key enabling components in photonic integrated circuits and systems. They are widely used in time-division multiplexing, optical signal synchronization and buffering, microwave signal processing, beam forming and steering, etc. The development of integrated photonics pushes forward the miniaturization of ODLs, offering improved performances in terms of stability, tuning speed, and power consumption. The integrated ODLs can be implemented using various structures, such as single or coupled resonators, gratings, photonic crystals, multi-path switchable structures, and recirculating loop structures. The delay tuning in ODLs is enabled by either changing the group refractive index of the waveguide or changing the length of the optical path. This paper reviews the recent development of integrated ODLs with a focus on their abundant applications and flexible implementations. The challenges and potentials of each type of ODLs are pointed out.

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“…Another feasible 1 × N optical switch is based on a phased array illustrated in Fig. 13(b) [99] . The optical wave is first divided into multiple beams by the first star coupler.…”

Section: Multi-path Switchable Delay Linesmentioning

confidence: 99%

Integrated optical delay lines: a review and perspective [Invited]

Zhou

Wang

et al. 2018

Chin. Opt. Lett.

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“…A fast-optical switch employing digital micromirror device (DMD)based wavelength selective switch was demonstrated [7], and a review on optical switches for data centers was reported [8]. To realize a waveguide-based optical switch with high speed, siliconsilica hybrid structure [9] is promising since silicon provides excellent thermal properties, although it was reported the investigation to enhance the switching speed of the silica-based optical switch by optimizing the waveguide structure and using an over-driving technique [10].…”

Section: Introductionmentioning

confidence: 99%

Scalability of Multi-Stage Nested Mach-Zehnder Interferometer Optical Switch with Phase Generating Couplers

Kawasako¹,

Watanabe²,

Nagayama³

et al. 2022

Adv. sci. technol. eng. syst. j.

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A nested Mach-Zehnder interferometer (MZI) configuration whose phase shifters are placed in parallel is suitable for silicon-silica hybrid structure to realize a high-speed optical switch. Even when the signal wavelength deviates from an optimal wavelength, the crosstalk of the nested MZI optical switch can be suppressed by employing phase generating couplers (PGCs) in place of directional couplers. We calculate the characteristics of a 4-stage nested MZI switch with PGCs, and show that crosstalk is lower than −40 dB over a wavelength range of as wide as 200 nm from 1450 to 1650 nm in six output ports. We also examine the scalability of the multi-stage nested MZI switch, and deduce the required number of switch stages for given output port counts with low crosstalk.

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“…Recently, its application to data center network is considered, [9][10][11] where switching speed is an issue. To realize a high-speed optical switch, silicon-silica hybrid structure 12,13) is promising from the point of view of the thermal properties of silicon. [14][15][16][17][18][19][20][21][22][23] A conventional cascaded Mach-Zehnder (MZI) switch 24,25) is not suitable for hybrid structure since phase shifters are arranged in series.…”

Section: Introductionmentioning

confidence: 99%

Nested Mach–Zehnder interferometer optical switch with phase generating couplers

Tasaki

Tokumaru

Watanabe

et al. 2020

Jpn. J. Appl. Phys.

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In reconfigurable optical networks, an optical switch is indispensable to afford routing optical signals without optical/electrical conversion. A nested Mach-Zehnder interferometer (MZI) optical switch is suitable for a silicon-silica hybrid structure compared with a conventional cascaded MZI switch. We proposed to employ phase generating couplers (PGCs) instead of directional couplers (DCs) in the nested MZI optical switch. Calculation results show that the nested MZI switch with PGCs exhibits <−30 dB crosstalk over wider wavelength range than that using DCs.

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Fabrication and demonstration of 1 × 8 silicon–silica multi-chip switch based on optical phased array

Cited by 5 publications

References 15 publications

Integrated optical delay lines: a review and perspective [Invited]

Integrated optical delay lines: a review and perspective [Invited]

Scalability of Multi-Stage Nested Mach-Zehnder Interferometer Optical Switch with Phase Generating Couplers

Nested Mach–Zehnder interferometer optical switch with phase generating couplers

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