Thermo-optical phase shifter with integrated diodes for multiplexed control

Ribeiro, A. B. Lobo; Bogaerts, Wim

doi:10.1364/ofc.2018.th2a.4

Cited by 3 publications

(3 citation statements)

References 4 publications

(4 reference statements)

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“…For example, if we simply expanded the 32 × 32 switch to a 64 × 64 switch, we would have to handle 8320 electrodes, which is much larger than that of the latest CPU packaging (LGA 3647). Therefore, some technology that reduces the number of electrodes, such as dynamic control using diodes [36] or integration with an address decoder, is necessary.…”

Section: Discussionmentioning

confidence: 99%

Low-Loss, Low-Crosstalk, and Large-Scale Optical Switch Based on Silicon Photonics

Suzuki

Konoike

Suda

et al. 2020

J. Lightwave Technol.

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We review the research progress of strictly nonblocking optical switches based on silicon photonics. We have developed a switch chip fabrication process based on a complementary metal-oxide-semiconductor pilot line and optical and electrical packaging technologies. We demonstrated all-paths transmission and switching of up to 32 input ports × 32 output ports with an average fiber-to-fiber insertion loss of 10.8 dB. Furthermore, we demonstrated an operating bandwidth wider than 100 nm for −30 dB crosstalk with double-Mach-Zehnder element switches in an 8 × 8 switch. For polarization-insensitive operation, we adopted a polarization diversity scheme and fabricated an 8 × 8 switch with fiber-based polarization-beam-splitters and two switch chips. The 8 × 8 switch exhibited a polarization-dependent loss of less than 0.5 dB. Moreover, an on-chip polarization diversity 8 × 8 switch integrated with polarization splitter rotators and two switch matrices on a single chip demonstrated a differential group delay less than 1 ps. Based on current technologies, we discuss the prospects for further port count expansion and remaining challenges for commercial deployment.

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Section: Discussionmentioning

confidence: 99%

Low-Loss, Low-Crosstalk, and Large-Scale Optical Switch Based on Silicon Photonics

Suzuki

Konoike

Suda

et al. 2020

J. Lightwave Technol.

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“…If we compose a 64 × 64 switch by simply expanding the PILOSS topology, we would have 8320 electrodes. Hence, we have to develop some new technology to reduce the number of electrodes, for example, the dynamic control of the phase-shifters [26], the integration with an address decoder, etc.…”

Section: Discussionmentioning

confidence: 99%

Strictly Non-Blocking Silicon Photonics Switches

Suzuki

Konoike

Suda

et al. 2020

IEICE Trans. Electron.

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We review our research progress of multi-port optical switches based on the silicon photonics platform. Up to now, the maximum port-count is 32 input ports × 32 output ports, in which transmissions of all paths were demonstrated. The switch topology is path-independent insertion-loss (PILOSS) which consists of an array of 2×2 element switches and intersections. The switch presented an average fiber-to-fiber insertion loss of 10.8 dB. Moreover, −20-dB crosstalk bandwidth of 14.2 nm was achieved with output-port-exchanged element switches, and an average polarization-dependent loss (PDL) of 3.2 dB was achieved with a nonduplicated polarization-diversity structure enabled by SiN overpass waveguides. In the 8 × 8 switch, we demonstrated wider than 100-nm bandwidth for less than −30-dB crosstalk with double Mach-Zehnder element switches, and less than 0.5 dB PDL with polarization diversity scheme which consisted of two switch matrices and fiber-type polarization beam splitters. Based on the switch performances described above, we discuss further improvement of switching performances.

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“…Heaters can be formed in doped silicon regions (50 µm long, 1 µm wide) placed about 0.7 µm away from optical waveguides in which the light is well confined. Using multiple diodes, about 21 mW of dissipated power was used to achieve pi phase shift in a Mach-Zehnder interferometer structure [17].…”

Section: Subsequent Extensionsmentioning

confidence: 99%