Cascade wide-angle Y-junction 1 × 16 optical power splitter based on silicon wire waveguides on silicon-on-insulator

Tao, Shaohua; Qing, Feng‐Ling; Song, Jun-Feng; Yu, Mingbin; Lo, Guo‐Qiang; Kwong, Dim‐Lee

doi:10.1364/oe.16.021456

Cited by 98 publications

(40 citation statements)

References 10 publications

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“…Microscopic photonic power couplers and nanophotonic delay devices could be combined such that much of the delay encoding and multiplexing aspect of this technology is achieved on compact photonic integrated circuits. 23,24 This would have the advantage of miniaturizing the delay encoding hardware into extremely compact integrated devices that reduce system size and light loss from connections between many discrete components. Delays can also be controlled extremely precisely with advanced integrated photonics technologies, opening the possibility of encoding more detector channels with smaller differences between identifying delays.…”

Section: C2 Photonic Devicesmentioning

confidence: 99%

Optical delay encoding for fast timing and detector signal multiplexing in PET

Grant

Levin

2015

Medical Physics

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Purpose: The large number of detector channels in modern positron emission tomography (PET) scanners poses a challenge in terms of readout electronics complexity. Multiplexing schemes are typically implemented to reduce the number of physical readout channels, but often result in performance degradation. Novel methods of multiplexing in PET must be developed to avoid this data degradation. The preservation of fast timing information is especially important for time-of-flight PET. Methods: A new multiplexing scheme based on encoding detector interaction events with a series of extremely fast overlapping optical pulses with precise delays is demonstrated in this work. Encoding events in this way potentially allows many detector channels to be simultaneously encoded onto a single optical fiber that is then read out by a single digitizer. A two channel silicon photomultiplier-based prototype utilizing this optical delay encoding technique along with dual threshold time-over-threshold is demonstrated. Results: The optical encoding and multiplexing prototype achieves a coincidence time resolution of 160 ps full width at half maximum (FWHM) and an energy resolution of 13.1% FWHM at 511 keV with 3 × 3 × 5 mm 3 LYSO crystals. All interaction information for both detectors, including timing, energy, and channel identification, is encoded onto a single optical fiber with little degradation. Conclusions: Optical delay encoding and multiplexing technology could lead to time-of-flight PET scanners with fewer readout channels and simplified data acquisition systems. C 2015 American Association of Physicists in Medicine. [http://dx

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Section: C2 Photonic Devicesmentioning

confidence: 99%

Optical delay encoding for fast timing and detector signal multiplexing in PET

Grant

Levin

2015

Medical Physics

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“…It has been successfully utilized for realizing optical power dividers, attenuators, and routers etc. [8]. Here a Y-junction coupler, for combining the power of pump and Stokes wave, is shown in Fig.…”

Section: A Y-junction Couplermentioning

confidence: 99%

“…It is expected that an efficient pump combiner in integrated platform would reduce a significant amount of power consumption in PICs. Though, there has been a significant work carried out in designing efficient power splitter, photonic multiplexers and demultiplexers [8]- [11], as per the authors' knowledge, no serious work has been carried out related to the efficient integrable pump combiner for SRS in silicon. Hence in this paper we propose a design for integrable coupler/power combiner for combining the pump and Stokes power for SRS.…”

Section: Introductionmentioning

confidence: 99%

Design of Efficient Photonic Coupler Structures for Lumped Raman Amplification in Silicon Waveguides

Dutta¹,

Datta

Sen

et al. 2014

2014 International Conference on Devices, Circuits and Communications (ICDCCom)

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New design for silicon based integrable coupler/ pump-combiner is presented in the paper. The pump-combiner is designed with the view of efficient stimulated Raman scattering/ Raman amplification in silicon waveguides. Performances of some couplers with well-known structure are also analyzed in this work. Analysis of the new coupler shows significant improvement in the transmittance performance compared with the well-known structures, discussed in the work.

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“…However, the most crucial regions of the Y-branch 1 8 optical splitter are the branching points of the splitting junctions at three different sections of the device, such as, at 1 2, 2 4 and 4 8 branching points. Various geometries of Y-branch have been proposed to minimize the branching losses [5,6,9,10]. In this paper, the fabrication and thorough characterization of a planar silica-based cascaded symmetric Y-branch optical power splitter is presented, the design of which is optimized with Y-branching waveguide comprising of a linear taper and symmetric S-bend arc branching waveguides.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and performance-analysis of a planar silica-based cascaded symmetric Y-branch 1 × 8 optical power splitter

Pal

Chauhan

Kumar

et al. 2009

J Opt

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Fabrication of a planar silica-based cascaded symmetric Y-branch 1 8 optical power splitter is described in this study. Post-fabrication, thorough analysis of device-performance is presented in terms of insertion loss, nonuniformity and polarization-dependent loss. The fabricated device is designed based on cascaded Y-branching waveguide, comprising of a linear taper and symmetric S-bend arc branching waveguides. The simulated values of the average insertion loss, non-uniformity and polarization-dependent loss at the wavelength of 1550 nm are found to be 9.37 dB, 0.35 dB and 0.04 dB respectively. However, the above parameters have been measured to be around 17.5 dB, 1.5 dB and 1.8 dB respectively, for the fabricated device at that wavelength. Measured parameters are compared with the simulated results over a wavelength region of C & L band range. Some preventive points to minimize the deviation of the measured values of the parameters from those of the simulated results are also discussed.

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Cascade wide-angle Y-junction 1 × 16 optical power splitter based on silicon wire waveguides on silicon-on-insulator

Cited by 98 publications

References 10 publications

Optical delay encoding for fast timing and detector signal multiplexing in PET

Optical delay encoding for fast timing and detector signal multiplexing in PET

Design of Efficient Photonic Coupler Structures for Lumped Raman Amplification in Silicon Waveguides

Fabrication and performance-analysis of a planar silica-based cascaded symmetric Y-branch 1 × 8 optical power splitter

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