Dan Marom - Academia.edu (original) (raw)

Papers by Dan Marom

Strong mixing in mode division multiplexed fiber reduces group delay spread, mode dependent loss ... more Strong mixing in mode division multiplexed fiber reduces group delay spread, mode dependent loss (MDL), and accumulated nonlinearity. Previously we demonstrated that it also broadens the passband of cascaded few-mode WSS passages. Here we analyze the performance of multi-core WSSs, and the favorable impact of strong coupling for MC-WSS cascades.

Strong mixing in mode division multiplexed fiber is advantageous in many aspects. Its averaging e... more Strong mixing in mode division multiplexed fiber is advantageous in many aspects. Its averaging effect reduces group delay spread, mode dependent loss (MDL), and accumulated nonlinearity. We demonstrated in the past that it also broadens the passband of cascaded few-mode WSS passages. In this paper, we analyze the performance of multicore WSS, and the favorable impact of strong coupling for MCF-WSS cascades, taking into account the asymmetry of the MCF.

We introduce a wavelength demultiplexer operating with multimode waveguides of rectangular geomet... more We introduce a wavelength demultiplexer operating with multimode waveguides of rectangular geometry matching ribbon fibers. This eliminates the spatial-spectral mixing at output waveguide coupling. Performance is stretched between the need to separate wavelengths and modes.

Journal of Lightwave Technology, Jul 1, 2017

The use of a rectangular core fiber is suggested for mode division multiplexed optical communicat... more The use of a rectangular core fiber is suggested for mode division multiplexed optical communication, and as an alternative fiber geometry having advantageous transmission and component integration attributes. The rectangular core is constrained to support single transverse modes in one direction and multiple modes in the horizontal transverse direction. The supported modes are thus polarization degenerate only (i.e., TE1x and TM1x), with well separated momenta and favorable mode profiles for device coupling and wavelength multiplexing and manipulation. A fiber prototype is experimentally characterized for its modal delays and field profiles by time-gated interferogram analysis.

An optimization procedure for spatial mode multiplexing from individual single-mode fibers into a... more An optimization procedure for spatial mode multiplexing from individual single-mode fibers into a three-mode fiber based on a spatial aperture sampling concept has been developed. By placing space-variant imaging elements between the single-mode and few-mode fibers, each beam aperture can be shaped for lower loss coupling and low mode-dependent losses. The optimization achieves a record theoretical −1.5-dB insertion loss, improving on the previous theoretical −2-dB record.

We present a switching concept based on total internal reflection (TIR) and frustrated-TIR (F-TIR... more We present a switching concept based on total internal reflection (TIR) and frustrated-TIR (F-TIR) using a MEMS movable waveguide fully compatible with silicon photonics technology. The switching element allows implementing large-scale photonic switches.

Conference on Lasers and Electro-Optics, 2022

We demonstrate 130 Gbps transmission in each of 4 spatial modes using Si3N4 soliton microcombs an... more We demonstrate 130 Gbps transmission in each of 4 spatial modes using Si3N4 soliton microcombs and inverse-designed silicon mode multiplexers. Out of 52 carriers, 42 data channels show natively error-free data transmission.

We optimize the refractive index grading for rectangular core fibers in support of mode division ... more We optimize the refractive index grading for rectangular core fibers in support of mode division multiplexing. Designs maximizing the effective index separations for MIMO-less support and others minimizing the differential group delays are identified.

Optical Fiber Communication Conference, Mar 5, 2006

A planar lightwave circuit with a length-imbalanced Mach-Zehnder interferometer and an arrayed wa... more A planar lightwave circuit with a length-imbalanced Mach-Zehnder interferometer and an arrayed waveguide grating radiating into free-space generates nonlinearly spatially dispersed light. This arrangement is advantageous for mitigating mirror edge effect in MEMS-based components.

Optical Fiber Communication Conference (OFC) 2022, 2022

We design mode-selective photonic lantern multiplexer using 3D waveguides made of photopolymer co... more We design mode-selective photonic lantern multiplexer using 3D waveguides made of photopolymer core and air cladding. Although the waveguides exhibit high index contrast, low loss (0.14dB), MDL (-0.06db), and mode group crosstalk (-21.2dB) are obtained.

IEEE Photonics Technology Letters, Mar 1, 2016

Optical Fiber Communication Conference, Mar 5, 2006

We characterize a 200GHz channel grid, wavelength-selective 4×1 switch with wide/flat passbands a... more We characterize a 200GHz channel grid, wavelength-selective 4×1 switch with wide/flat passbands and low chromatic dispersion (|CD|<10ps/nm) for 160Gb/s transmission rates. Our findings indicate that the penalties associated with ISI and dispersion are very high.

Journal of The Optical Society of America B-optical Physics, Jun 13, 2013

Laser-based Micro- and Nanoprocessing XVII

Nature Communications

The use of optical interconnects has burgeoned as a promising technology that can address the lim... more The use of optical interconnects has burgeoned as a promising technology that can address the limits of data transfer for future high-performance silicon chips. Recent pushes to enhance optical communication have focused on developing wavelength-division multiplexing technology, and new dimensions of data transfer will be paramount to fulfill the ever-growing need for speed. Here we demonstrate an integrated multi-dimensional communication scheme that combines wavelength- and mode- multiplexing on a silicon photonic circuit. Using foundry-compatible photonic inverse design and spectrally flattened microcombs, we demonstrate a 1.12-Tb/s natively error-free data transmission throughout a silicon nanophotonic waveguide. Furthermore, we implement inverse-designed surface-normal couplers to enable multimode optical transmission between separate silicon chips throughout a multimode-matched fibre. All the inverse-designed devices comply with the process design rules for standard silicon ph...

2018 European Conference on Optical Communication (ECOC), 2018

Previous estimates of ROADM architectures focus on connection states of WSS. Here we account for ... more Previous estimates of ROADM architectures focus on connection states of WSS. Here we account for total switching functions (routing and add/drop) and quantify the impact of contentional and directional ROADM designs on switching capacity.

Optical Fiber Communication Conference (OFC) 2019, 2019

We present SDM-ROADM architectures for independent spatial channel routing and add/drop, investig... more We present SDM-ROADM architectures for independent spatial channel routing and add/drop, investigating C/D/C and degrees of practical directional constraints. These are quantified via the switching capacity metric.

2021 IEEE Photonics Conference (IPC), 2021

We design and simulate a photonic lantern mode multiplexer compatible with 3D optical waveguide f... more We design and simulate a photonic lantern mode multiplexer compatible with 3D optical waveguide fabrication by direct laser writing, with a photopolymer core and an air cladding. Although the waveguides exhibit high index contrast, excellent performance metrics are obtained for a two mode, micro-scale multiplexer.

Strong mixing in mode division multiplexed fiber reduces group delay spread, mode dependent loss ... more Strong mixing in mode division multiplexed fiber reduces group delay spread, mode dependent loss (MDL), and accumulated nonlinearity. Previously we demonstrated that it also broadens the passband of cascaded few-mode WSS passages. Here we analyze the performance of multi-core WSSs, and the favorable impact of strong coupling for MC-WSS cascades.

Strong mixing in mode division multiplexed fiber is advantageous in many aspects. Its averaging e... more Strong mixing in mode division multiplexed fiber is advantageous in many aspects. Its averaging effect reduces group delay spread, mode dependent loss (MDL), and accumulated nonlinearity. We demonstrated in the past that it also broadens the passband of cascaded few-mode WSS passages. In this paper, we analyze the performance of multicore WSS, and the favorable impact of strong coupling for MCF-WSS cascades, taking into account the asymmetry of the MCF.

We introduce a wavelength demultiplexer operating with multimode waveguides of rectangular geomet... more We introduce a wavelength demultiplexer operating with multimode waveguides of rectangular geometry matching ribbon fibers. This eliminates the spatial-spectral mixing at output waveguide coupling. Performance is stretched between the need to separate wavelengths and modes.

Journal of Lightwave Technology, Jul 1, 2017

The use of a rectangular core fiber is suggested for mode division multiplexed optical communicat... more The use of a rectangular core fiber is suggested for mode division multiplexed optical communication, and as an alternative fiber geometry having advantageous transmission and component integration attributes. The rectangular core is constrained to support single transverse modes in one direction and multiple modes in the horizontal transverse direction. The supported modes are thus polarization degenerate only (i.e., TE1x and TM1x), with well separated momenta and favorable mode profiles for device coupling and wavelength multiplexing and manipulation. A fiber prototype is experimentally characterized for its modal delays and field profiles by time-gated interferogram analysis.

An optimization procedure for spatial mode multiplexing from individual single-mode fibers into a... more An optimization procedure for spatial mode multiplexing from individual single-mode fibers into a three-mode fiber based on a spatial aperture sampling concept has been developed. By placing space-variant imaging elements between the single-mode and few-mode fibers, each beam aperture can be shaped for lower loss coupling and low mode-dependent losses. The optimization achieves a record theoretical −1.5-dB insertion loss, improving on the previous theoretical −2-dB record.

We present a switching concept based on total internal reflection (TIR) and frustrated-TIR (F-TIR... more We present a switching concept based on total internal reflection (TIR) and frustrated-TIR (F-TIR) using a MEMS movable waveguide fully compatible with silicon photonics technology. The switching element allows implementing large-scale photonic switches.

Conference on Lasers and Electro-Optics, 2022

We demonstrate 130 Gbps transmission in each of 4 spatial modes using Si3N4 soliton microcombs an... more We demonstrate 130 Gbps transmission in each of 4 spatial modes using Si3N4 soliton microcombs and inverse-designed silicon mode multiplexers. Out of 52 carriers, 42 data channels show natively error-free data transmission.

We optimize the refractive index grading for rectangular core fibers in support of mode division ... more We optimize the refractive index grading for rectangular core fibers in support of mode division multiplexing. Designs maximizing the effective index separations for MIMO-less support and others minimizing the differential group delays are identified.

Optical Fiber Communication Conference, Mar 5, 2006

A planar lightwave circuit with a length-imbalanced Mach-Zehnder interferometer and an arrayed wa... more A planar lightwave circuit with a length-imbalanced Mach-Zehnder interferometer and an arrayed waveguide grating radiating into free-space generates nonlinearly spatially dispersed light. This arrangement is advantageous for mitigating mirror edge effect in MEMS-based components.

Optical Fiber Communication Conference (OFC) 2022, 2022

We design mode-selective photonic lantern multiplexer using 3D waveguides made of photopolymer co... more We design mode-selective photonic lantern multiplexer using 3D waveguides made of photopolymer core and air cladding. Although the waveguides exhibit high index contrast, low loss (0.14dB), MDL (-0.06db), and mode group crosstalk (-21.2dB) are obtained.

IEEE Photonics Technology Letters, Mar 1, 2016

Optical Fiber Communication Conference, Mar 5, 2006

We characterize a 200GHz channel grid, wavelength-selective 4×1 switch with wide/flat passbands a... more We characterize a 200GHz channel grid, wavelength-selective 4×1 switch with wide/flat passbands and low chromatic dispersion (|CD|<10ps/nm) for 160Gb/s transmission rates. Our findings indicate that the penalties associated with ISI and dispersion are very high.

Journal of The Optical Society of America B-optical Physics, Jun 13, 2013

Laser-based Micro- and Nanoprocessing XVII

Nature Communications

The use of optical interconnects has burgeoned as a promising technology that can address the lim... more The use of optical interconnects has burgeoned as a promising technology that can address the limits of data transfer for future high-performance silicon chips. Recent pushes to enhance optical communication have focused on developing wavelength-division multiplexing technology, and new dimensions of data transfer will be paramount to fulfill the ever-growing need for speed. Here we demonstrate an integrated multi-dimensional communication scheme that combines wavelength- and mode- multiplexing on a silicon photonic circuit. Using foundry-compatible photonic inverse design and spectrally flattened microcombs, we demonstrate a 1.12-Tb/s natively error-free data transmission throughout a silicon nanophotonic waveguide. Furthermore, we implement inverse-designed surface-normal couplers to enable multimode optical transmission between separate silicon chips throughout a multimode-matched fibre. All the inverse-designed devices comply with the process design rules for standard silicon ph...

2018 European Conference on Optical Communication (ECOC), 2018

Previous estimates of ROADM architectures focus on connection states of WSS. Here we account for ... more Previous estimates of ROADM architectures focus on connection states of WSS. Here we account for total switching functions (routing and add/drop) and quantify the impact of contentional and directional ROADM designs on switching capacity.

Optical Fiber Communication Conference (OFC) 2019, 2019

We present SDM-ROADM architectures for independent spatial channel routing and add/drop, investig... more We present SDM-ROADM architectures for independent spatial channel routing and add/drop, investigating C/D/C and degrees of practical directional constraints. These are quantified via the switching capacity metric.

2021 IEEE Photonics Conference (IPC), 2021

We design and simulate a photonic lantern mode multiplexer compatible with 3D optical waveguide f... more We design and simulate a photonic lantern mode multiplexer compatible with 3D optical waveguide fabrication by direct laser writing, with a photopolymer core and an air cladding. Although the waveguides exhibit high index contrast, excellent performance metrics are obtained for a two mode, micro-scale multiplexer.