Multichannel Parallel Polymer Waveguide With Circular W-Shaped Index Profile Cores

Takeyoshi, Yusuke; Ishigure, Takaaki

doi:10.1109/lpt.2007.906842

Cited by 7 publications

(3 citation statements)

References 8 publications

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“…In [12], we adjust the concentration of benzyl methacrylate (BzMA) in the copolymer for the cladding to obtain a different depth of the index valley. Furthermore, in our previous study, we preliminary verified a crosstalk reduction due to a W-shaped refractive index profile [13] with only a shallow index valley.…”

Section: Introductionmentioning

confidence: 52%

“…In this paper, we adopt the fabrication method reported in [12] to adjust the index valley, and then follow the similar technique reported in [13] to fabricate several multi-channel PPOWs with W-shaped index profile (W-shaped PPOWs). Meanwhile, for a theoretical analysis of propagation loss and crosstalk in W-shaped PPOWs, we apply the previously developed ray tracing method that involves the light scattering effect [14].…”

Section: Introductionmentioning

confidence: 99%

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Fabrication and inter-channel crosstalk analysis of polymer optical waveguides with W-shaped index profile for high-density optical interconnections

2011

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For applications in high-density and high-speed optical interconnections, we propose to utilize polymer parallel optical waveguides (PPOWs) with so-called W-shaped refractive index profile in the core area. A W-shaped index profile is composed of a parabolic index distribution surrounded by a narrow index valley, followed by a cladding with a uniform refractive index. We expect that W-shaped index profiles contribute to decreasing the inter-channel crosstalk due to mode conversion in the waveguides. In this paper, we investigate how much the index difference of the index valley improves the crosstalk value. First, we fabricate polymer waveguides with various index profiles by changing the composition of the copolymer for cladding. We show the results that a 1-m long W-shaped profile PPOW has not only low propagation loss (0.027 dB/cm), but an inter-channel crosstalk (~-40 dB) lower than those of graded index (GI) core PPOW we previously fabricated. Next, we theoretically analyze the propagation loss and inter-channel crosstalk in polymer waveguides with different index profiles by means of a ray tracing model in which the light scattering effect is included. The calculation results indicate that the index valley surrounding each core works properly for preventing the power coupling from the cladding modes to the propagation modes, and consequently, very low inter-channel crosstalk is realized with W-shaped index profiles.

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Section: Introductionmentioning

confidence: 52%

Section: Introductionmentioning

confidence: 99%

Fabrication and inter-channel crosstalk analysis of polymer optical waveguides with W-shaped index profile for high-density optical interconnections

2011

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“…In our previous study, we experimentally verify a strong crosstalk reduction due to the W-shaped refractive index profile [1]. In this paper, we apply the ray tracing method with the light scattering effect we previously developed [2] for the theoretical analysis.…”

Section: Introductionmentioning

confidence: 83%

Inter-channel crosstalk analysis for W-shaped and graded-index core polymer optical waveguides with ray tracing method

2011

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For high-density and high-speed optical interconnections using parallel polymer optical waveguides (PPOW), we theoretically and experimentally demonstrate that W-shaped refractive index profiles in the cores are capable of decreasing the inter-channel crosstalk compared to step-index (SI) and even to graded index (GI) waveguides. In this paper, first we analyze the optical characteristics of polymer waveguides with different index profiles by means of the ray tracing model with scattering effect previously we developed. The calculation results confirm the index valley surrounding each core works properly for preventing the power coupling from the cladding modes to the propagation modes. Next, we show the fabrication process (preform method) for such a waveguide, where the cladding material is composed of a copolymer of methyl methacrylate (MMA) and benzyl methacrylate (BzMA). Compared to a GI-core PPOW we previously fabricated with the same core material, the 1-m long PPOW with W-shaped refractive index profile exhibits not only a low propagation loss (0.027 dB/cm), but an even lower inter-channel crosstalk value (-32 dB).

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Maximum channel density in multimode optical waveguides for parallel interconnections

Ishiguro

Uno

Hsu

2011

2011 IEEE 61st Electronic Components and Technology Conference (ECTC)

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Multichannel Parallel Polymer Waveguide With Circular W-Shaped Index Profile Cores

Cited by 7 publications

References 8 publications

Fabrication and inter-channel crosstalk analysis of polymer optical waveguides with W-shaped index profile for high-density optical interconnections

Fabrication and inter-channel crosstalk analysis of polymer optical waveguides with W-shaped index profile for high-density optical interconnections

Inter-channel crosstalk analysis for W-shaped and graded-index core polymer optical waveguides with ray tracing method

Maximum channel density in multimode optical waveguides for parallel interconnections

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