Multi-Channel Single-Mode Polymer Waveguide Fabricated Using the Mosquito Method

Yakabe, Sho; Matsui, Hiromitsu; Kobayashi, Yasuhiro; Saito, Yuki; Manabe, Ken; Ishigure, Takaaki

doi:10.1109/jlt.2020.3029395

Cited by 12 publications

(3 citation statements)

References 14 publications

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“…Due to the growing bandwidth requirement for high-performance computing systems and high-speed servers, optical interconnects have intensive advantages over electrical interconnects because optical interconnects transmit high-speed signals with less attenuation, consume low power, and exhibit low crosstalk and high-speed data transmission rates [1][2][3]. For the development of next-generation high-performance computing systems, various configurations of short-reach optical interconnect, particularly waveguides [4], beam splitters [5], couplers [6], modulators [7], etc. are required, and polymer optical waveguides are one of the candidate technology to develop these optical devices.…”

Section: Introductionmentioning

confidence: 99%

Graded-index core-based polarization dependence beam splitters realized with symmetric polymer directional couplers

Rasel¹,

Tasnim²,

Afsary³

et al. 2023

Preprint

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In this paper, we design and demonstrate polymer-based polarization dependence beam splitters realized with graded-index (GI) parabolic directional couplers at 1550 nm. We investigate these directional couplers by using the beam propagation method (BPM) and the RSoft CAD BeamPROP solver is used for model design and characterization. We investigate the splitting ratio of 50:50 and 100:0 of these beam splitters for both TE and TM modes. In particular, the 50:50 beam splitters exhibit an output efficiency of 95% due to the absence of polarization. However, in presence of the polarization effect, the polarization dependency is analyzed and manipulated successfully, and the input intensity increases by approximately 98% at an incident angle of 31° due to the polarized launch field. Moreover, the 100:0 beam splitters act as the switching devices realized with GI polymer directional couplers. The insertion losses of the GI splitters are 0.162 dB and 0.186 dB, while the excess losses are 0.148 dB and 0.149 dB for TE and TM modes, respectively. Also, the polarization extinction ratio (PER) of the 100:0 beam splitters is >25 dB and >20 dB for TE and TM modes, respectively.

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Section: Introductionmentioning

confidence: 99%

Graded-index core-based polarization dependence beam splitters realized with symmetric polymer directional couplers

Rasel¹,

Tasnim²,

Afsary³

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…These waveguides offer numerous benefits, including high wire density, cost-effectiveness, flexibility, ease of manufacture, and tolerance for fabrication errors [8,9]. However, polymer waveguides with high index contrast introduce significant polarization effects, necessitating polarization beam splitters (PBS) [10]. Over the past few years, directional couplers based on PBS have attracted considerable interest due to their wide range of applications [11,12].…”

Section: Introductionmentioning

confidence: 99%

Polarization manipulation on step-index composite polymer couplers for photonics circuitry

Afsary,

Tasnim,

Rasel

et al. 2023

Preprint

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In this research, a high-performance, polymer-based step-index composite coupler is designed and analyzed for integrated circuit applications, as it provides a critical tool for controlling the polarization of light, which is essential for a range of applications in optical communication systems. We examine the organic-inorganic hybrid polymer materials used to create the polymer-based composite beam splitter (CBS) at a 1.55 m wavelength with a step-index (SI) profile. We used the beam propagation and alternating direction implicit technique to develop and analyze the coupler. Our findings demonstrate that the suggested coupler successfully manipulates and analyzes its polarization dependency to attain a 99% output efficiency for the 50:50 splitting ratio utilizing a step-index (SI) profile. We enhanced the input intensity by about 56% for the SI profile with a 0.158 numerical aperture and a 31° input light angle. Additionally, the full width at half maximum was 4.67 and 7.74 degrees for φ=0 and 90 degrees, respectively. Without any polarization impact, we saw an excess loss of 0.014 dB, which rose to roughly 2 dB after polarization, and then fell to 0.05 dB at a 31-degree angle. Similar to the crosstalk, which was -25.06 dB without any polarization and changed to -19.77 dB at a 31-degree angle after polarization.

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“…Remarkable efforts towards full integration of optical circuity on Si chips are being witnessed, moving from on-edge electro-optical modulation-demodulation stages, to active-optical cables, and eventually targeting all-optical on board optical interconnects 7 . On the road-map to this target, special optical components are being innovated to pave the way, such as special on-board waveguides 8 , optical multiplexers, and optical fiber-to-chip adapters 7 . More importantly, realizing complementary metal-oxide-semiconductor (CMOS)-compatible light sources 9 , 10 with the ability to exchange optical data vertically is required, as flip-chip bonding is probably inevitable to realize such an optical data link between CMOS chips and printed boards 7 .…”

Section: Introductionmentioning

confidence: 99%

Chiral germanium micro-gears for tuning orbital angular momentum

Al-Attili

Burt

Zuo

et al. 2022

Sci Rep

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Group IV light sources with vertical emission and non-zero orbital-angular momentum (OAM) promise to unlock many novel applications. In this report, we demonstrate cylindrically symmetrical germanium micro-gear cavities, fabricated by etching a grating around the circumference of standard micro-disks, with periods ranging from 14 to 22. Photoluminescence (PL) measurements were done to identify the confined whispering-gallery modes (WGM). Finite-difference time-domain (FDTD) simulations were conducted to map the resonant modes to their modal profiles and characteristics. Vertical emission of WGMs with non-zero OAM was demonstrated, with a clear dependence of the OAM order ($$\ell$$ ℓ ) on the WGM azimuthal order and the number of micro-gear grating periods. As the chirality, or the direction of rotation, is not controlled in a symmetrical cavity, we propose introducing staircase or triangular-shaped gear periods resulting in an asymmetry. By choosing the diameter, number of periods, and the asymmetrical direction of the gear-teeth, it is possible to generate OAM signals with certain wavelength, OAM order and chirality.

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Multi-Channel Single-Mode Polymer Waveguide Fabricated Using the Mosquito Method

Cited by 12 publications

References 14 publications

Graded-index core-based polarization dependence beam splitters realized with symmetric polymer directional couplers

Graded-index core-based polarization dependence beam splitters realized with symmetric polymer directional couplers

Polarization manipulation on step-index composite polymer couplers for photonics circuitry

Chiral germanium micro-gears for tuning orbital angular momentum

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