Wavelength-Insensitive Integrated-Optic Circuit Consisting of Asymmetric X-Junction Couplers for Recognition of BPSK Labels

Hiura, Hitoshi; Goto, Nobuo; Yanagiya, Shin-ichiro

doi:10.1109/jlt.2009.2031879

Cited by 15 publications

(6 citation statements)

References 19 publications

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“…We compare these results with the tree-structure waveguide circuits with asymmetric X-junction couplers reported by Hiura et al [12] designed for 2 N N-bit BPSK labels. The number of recognizable bits can be increased with the number of concatenating stage of the asymmetric X-junction couplers.…”

Section: Discussionmentioning

confidence: 90%

“…We have proposed a passive waveguide circuit to recognize all BPSK coded labels [11], [12]. The device consists of a tree-structure connection of asymmetric X-junction couplers [13].…”

Section: Introductionmentioning

confidence: 99%

“…The number of the output ports for N-bit labels is 2 N . The contrast ratio, which is expressed as the ratio of Manuscript the largest intensity at the desired output port corresponding to the incident label to the secondly largest intensity among other ports, is 2.78 and 1.65 for N = 4 and 8, respectively [12]. We also proposed another recognition circuit for a partial set of the binary codes, which provides an infinite contrast ratio [14].…”

Section: Introductionmentioning

confidence: 99%

“…4, we apply similar methods to 8-bit labels. The results are discussed in comparison with tree-structure waveguide circuits [12] in Sect. 5.…”

Section: Introductionmentioning

confidence: 99%

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Increase of Recognizable Label Number with Optical Passive Waveguide Circuits for Recognition of Encoded 4- and 8-Bit BPSK Labels

Kishikawa

Ihara

Goto

et al. 2017

IEICE Trans. Electron.

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Optical label processing is expected to reduce power consumption in label switching network nodes. Previously, we proposed passive waveguide circuits for the recognition of BPSK labels with a theoretically infinite contrast ratio. The recognizable label number was limited to four and eight for 4-bit and 8-bit BPSK labels, respectively. In this paper, we propose methods to increase the recognizable label number. The proposed circuits can recognize eight and sixteen labels of 4-bit BPSK codes with a contrast ratio of 4.00 and 2.78, respectively. As 8-bit BSPK codes, 64, 128, and 256 labels can be recognized with a contrast ratio of 4.00, 2.78, and 1.65, respectively. In recognition of all encoded labels, that is, 16 and 256 labels for 4-bit and 8-bit BPSK labels, a reference signal is employed to identify the sign of the optical output signals. The effect of phase deviation and loss along the optical waveguides of the devices is also discussed.

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Section: Discussionmentioning

confidence: 90%

“…We have proposed a passive waveguide circuit to recognize all BPSK coded labels [11], [12]. The device consists of a tree-structure connection of asymmetric X-junction couplers [13].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…4, we apply similar methods to 8-bit labels. The results are discussed in comparison with tree-structure waveguide circuits [12] in Sect. 5.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Increase of Recognizable Label Number with Optical Passive Waveguide Circuits for Recognition of Encoded 4- and 8-Bit BPSK Labels

Kishikawa

Ihara

Goto

et al. 2017

IEICE Trans. Electron.

View full text Add to dashboard Cite

show abstract

“…[10] The label recognition system consists of a treestructure connection of passive waveguide components named as asymmetric X-junction coupler, [11] and time gates. The asymmetric X-junction coupler provides a function of wave coupling according to the phase relation between the two incident waves.…”

Section: Introductionmentioning

confidence: 99%