PMID- 20588466
OWN - NLM
STAT- MEDLINE
DCOM- 20101014
LR  - 20181023
IS  - 1094-4087 (Electronic)
IS  - 1094-4087 (Linking)
VI  - 18
IP  - 13
DP  - 2010 Jun 21
TI  - High-density channel alignment of graded index core polymer optical waveguide and 
      its crosstalk analysis with ray tracing method.
PG  - 13368-78
LID - 10.1364/OE.18.013368 [doi]
AB  - We fabricate graded index (GI) multi-channel polymer optical waveguides comprised 
      of poly methyl methacrylate (PMMA)-poly benzyl methacrylate copolymer for the 
      purpose of achieving high thermal stability in the GI profiles. The waveguides 
      obtained show slightly higher propagation loss (0.033 dB/cm at 850 nm) than doped 
      PMMA based GI-core polymer waveguides we have reported, due to the excess 
      scattering loss inherent to the mixture of copolymer and homo-polymer in the core 
      area. In this paper, we focus on the influence of the excess scattering loss on 
      mode conversion and inter-channel crosstalk. We simulate the behavior of light 
      propagating inside the core with and without the scattering effect. Using the 
      simulation, the excess loss experimentally observed in the copolymer-core 
      waveguide is successfully reproduced, and then, we find that the excess 
      scattering loss of 0.008 dB/cm could increase the inter-channel crosstalk from 
      -30 dB to -23 dB which agrees with the experimentally observed value. Although 
      the simulation of the inter-channel crosstalk was performed only on our GI-core 
      polymer optical waveguides, it is capable of modeling the conventional SI 
      rectangular-core waveguides. Some amount of excess scattering is generally 
      observed in the conventional SI-core waveguides, and thus, the application of 
      this simulation to SI-core waveguides allows a feasible design for high-density 
      alignment of the waveguides.
FAU - Hsu, Hsiang-Han
AU  - Hsu HH
AD  - Graduate School of Science and Technology, Keio University, Kohoku-ku, Yokohama, 
      Japan. hhhsu@z6.keio.jp
FAU - Ishigure, Takaaki
AU  - Ishigure T
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - Opt Express
JT  - Optics express
JID - 101137103
RN  - 0 (Polymethacrylic Acids)
RN  - 0 (polybenzylmethacrylate)
RN  - 9011-14-7 (Polymethyl Methacrylate)
SB  - IM
MH  - Electronics/*methods
MH  - *Light
MH  - Microscopy
MH  - Models, Theoretical
MH  - Polymethacrylic Acids/*chemistry
MH  - Polymethyl Methacrylate/*chemistry
MH  - Refractometry
MH  - Scattering, Radiation
MH  - Temperature
EDAT- 2010/07/01 06:00
MHDA- 2010/10/15 06:00
CRDT- 2010/07/01 06:00
PHST- 2010/07/01 06:00 [entrez]
PHST- 2010/07/01 06:00 [pubmed]
PHST- 2010/10/15 06:00 [medline]
AID - 201814 [pii]
AID - 10.1364/OE.18.013368 [doi]
PST - ppublish
SO  - Opt Express. 2010 Jun 21;18(13):13368-78. doi: 10.1364/OE.18.013368.