Optical Intensity Modulator Using a Pair of Optical Gate Couplers and Conventional Phase Shifters

Makoto MINAKATA; Tomoaki YAMADA; Shingo UEHARA

Optical Intensity Modulator Using a Pair of Optical Gate Couplers and Conventional Phase Shifters

Makoto MINAKATA, Tomoaki YAMADA, Shingo UEHARA

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We report a performance analysis and experimental results of an optical intensity modulator using a pair of optical gate couplers and conventional electro-optic phase shifters. The modulator involves only three straight waveguides. The optical gate coupler consists of three coupled waveguides. At the input gate coupler, input light is equally divided and fed into parallel arms of the phase shifters. A retardation φ between the two arms of the phase shifters is controlled electro-optically by applied voltage. At the output gate coupler, both lights are re-combined according to the phase shifts. The modulator is fabricated monolithically by diffusing Ti into a z-cut LiNbO₃. Each patterned waveguide is about 6 µm wide and spacing is 2.9 µm at the gate coupler. The lenght of the gate coupler is 6 mm and a pair of electrodes are 7 mm long and the spacing is 12 µm. For E^y₀₀mode (r₁₃) the half-wave voltage is 21 V, the extinction ratio is 11.3 dB and insertion loss is 9.8 dB at 1.15 µm.

Publication: IEICE TRANSACTIONS on transactions Vol.E61-E No.3 pp.148-150

Publication Date: 1978/03/25

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Type of Manuscript: Special Section PAPER (Special Issue on Integrated Optics and Optical Fiber Communications)

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Makoto MINAKATA
Tomoaki YAMADA
Shingo UEHARA

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Makoto MINAKATA, Tomoaki YAMADA, Shingo UEHARA, "Optical Intensity Modulator Using a Pair of Optical Gate Couplers and Conventional Phase Shifters" in IEICE TRANSACTIONS on transactions, vol. E61-E, no. 3, pp. 148-150, March 1978, doi: .
Abstract: We report a performance analysis and experimental results of an optical intensity modulator using a pair of optical gate couplers and conventional electro-optic phase shifters. The modulator involves only three straight waveguides. The optical gate coupler consists of three coupled waveguides. At the input gate coupler, input light is equally divided and fed into parallel arms of the phase shifters. A retardation φ between the two arms of the phase shifters is controlled electro-optically by applied voltage. At the output gate coupler, both lights are re-combined according to the phase shifts. The modulator is fabricated monolithically by diffusing Ti into a z-cut LiNbO₃. Each patterned waveguide is about 6 µm wide and spacing is 2.9 µm at the gate coupler. The lenght of the gate coupler is 6 mm and a pair of electrodes are 7 mm long and the spacing is 12 µm. For E^y₀₀mode (r₁₃) the half-wave voltage is 21 V, the extinction ratio is 11.3 dB and insertion loss is 9.8 dB at 1.15 µm.
URL: https://global.ieice.org/en_transactions/transactions/10.1587/e61-e_3_148/_p

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@ARTICLE{e61-e_3_148,
author={Makoto MINAKATA, Tomoaki YAMADA, Shingo UEHARA, },
journal={IEICE TRANSACTIONS on transactions},
title={Optical Intensity Modulator Using a Pair of Optical Gate Couplers and Conventional Phase Shifters},
year={1978},
volume={E61-E},
number={3},
pages={148-150},
abstract={We report a performance analysis and experimental results of an optical intensity modulator using a pair of optical gate couplers and conventional electro-optic phase shifters. The modulator involves only three straight waveguides. The optical gate coupler consists of three coupled waveguides. At the input gate coupler, input light is equally divided and fed into parallel arms of the phase shifters. A retardation φ between the two arms of the phase shifters is controlled electro-optically by applied voltage. At the output gate coupler, both lights are re-combined according to the phase shifts. The modulator is fabricated monolithically by diffusing Ti into a z-cut LiNbO₃. Each patterned waveguide is about 6 µm wide and spacing is 2.9 µm at the gate coupler. The lenght of the gate coupler is 6 mm and a pair of electrodes are 7 mm long and the spacing is 12 µm. For E^y₀₀mode (r₁₃) the half-wave voltage is 21 V, the extinction ratio is 11.3 dB and insertion loss is 9.8 dB at 1.15 µm.},
keywords={},
doi={},
ISSN={},
month={March},}

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TY - JOUR
TI - Optical Intensity Modulator Using a Pair of Optical Gate Couplers and Conventional Phase Shifters
T2 - IEICE TRANSACTIONS on transactions
SP - 148
EP - 150
AU - Makoto MINAKATA
AU - Tomoaki YAMADA
AU - Shingo UEHARA
PY - 1978
DO -
JO - IEICE TRANSACTIONS on transactions
SN -
VL - E61-E
IS - 3
JA - IEICE TRANSACTIONS on transactions
Y1 - March 1978
AB - We report a performance analysis and experimental results of an optical intensity modulator using a pair of optical gate couplers and conventional electro-optic phase shifters. The modulator involves only three straight waveguides. The optical gate coupler consists of three coupled waveguides. At the input gate coupler, input light is equally divided and fed into parallel arms of the phase shifters. A retardation φ between the two arms of the phase shifters is controlled electro-optically by applied voltage. At the output gate coupler, both lights are re-combined according to the phase shifts. The modulator is fabricated monolithically by diffusing Ti into a z-cut LiNbO₃. Each patterned waveguide is about 6 µm wide and spacing is 2.9 µm at the gate coupler. The lenght of the gate coupler is 6 mm and a pair of electrodes are 7 mm long and the spacing is 12 µm. For E^y₀₀mode (r₁₃) the half-wave voltage is 21 V, the extinction ratio is 11.3 dB and insertion loss is 9.8 dB at 1.15 µm.
ER -