The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
질화물 다중 양자 우물에서 1.55μm의 부대역간 흡수 포화를 활용하는 비선형 광 도파관에서 펨토초 펄스의 전파 및 게이트 작동이 처음으로 시뮬레이션되었습니다. 계산은 서브밴드 간 반송파 역학을 설명하는 1단계 속도 방정식과 결합된 200차원 유한차분 시간 영역(FD-TD) 방법으로 수행되었습니다. 펄스 폭이 1fs 미만일 때 흡수는 1.6ps 이내에 회복되어 100-Tb/s 작동이 가능합니다. 그러나 신호와 제어 펄스 사이의 간섭 효과와 간섭으로 인해 전파에 따라 펄스 형태가 변형될 수 있으므로 펄스 폭 및 입사 타이밍의 최적화가 필요합니다. 전파가 진행됨에 따라 투명창(제어 펄스의 폭)이 짧아지므로 제어 펄스의 폭은 신호 펄스의 폭보다 넓게 설정해야 합니다. 예를 들어, 300μm, 1.5fs 신호 펄스가 500μm 길이 도파관에서 140μm 파장의 15fs 제어 펄스에 의해 게이트되는 경우를 가정합니다. 부드러운 포락선을 갖는 XNUMXfs 게이트 신호 펄스는 대역 통과 필터 뒤에 나타날 것으로 예상됩니다. 소광비는 XNUMXdB보다 클 것으로 예상됩니다.
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부
Nobuo SUZUKI, Norio IIZUKA, Kei KANEKO, "FDTD Simulation of Femtosecond Optical Gating in Nonlinear Optical Waveguide Utilizing Intersubband Transition in AlGaN/GaN Quantum Wells" in IEICE TRANSACTIONS on Electronics,
vol. E83-C, no. 6, pp. 981-988, June 2000, doi: .
Abstract: The propagation and the gate operation of femtosecond pulses in nonlinear optical waveguides utilizing the saturation of the intersubband absorption at 1.55 µm in nitride multiple quantum wells are simulated for the first time. The calculation was carried out by a one-dimensional finite-difference time-domain (FD-TD) method combined with three-level rate equations describing the intersubband carrier dynamics. The absorption recovers within 1 ps when the pulse width is less than 200 fs, which will allow 1-Tb/s operation. However, the pulse shape may be deformed with the propagation due to the coherent effect and the interference between the signal and the control pulses, and thus, optimization of the pulse widths and the incident timing is required. Since the transparent window (width of the control pulse) becomes shorter according to the propagation, the width of the control pulse should be set broader than that of the signal pulse. As an example, we assume the case where a 1.6-µm, 100-fs signal pulse is gated by a 300-fs control pulse at a wavelength of 1.5 µm in a 500-µm length waveguide. A 140-fs gated signal pulse with a smooth envelope is expected to appear after the band-pass filter. The extinction ratio is expected to be greater than 15 dB.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/e83-c_6_981/_p
부
@ARTICLE{e83-c_6_981,
author={Nobuo SUZUKI, Norio IIZUKA, Kei KANEKO, },
journal={IEICE TRANSACTIONS on Electronics},
title={FDTD Simulation of Femtosecond Optical Gating in Nonlinear Optical Waveguide Utilizing Intersubband Transition in AlGaN/GaN Quantum Wells},
year={2000},
volume={E83-C},
number={6},
pages={981-988},
abstract={The propagation and the gate operation of femtosecond pulses in nonlinear optical waveguides utilizing the saturation of the intersubband absorption at 1.55 µm in nitride multiple quantum wells are simulated for the first time. The calculation was carried out by a one-dimensional finite-difference time-domain (FD-TD) method combined with three-level rate equations describing the intersubband carrier dynamics. The absorption recovers within 1 ps when the pulse width is less than 200 fs, which will allow 1-Tb/s operation. However, the pulse shape may be deformed with the propagation due to the coherent effect and the interference between the signal and the control pulses, and thus, optimization of the pulse widths and the incident timing is required. Since the transparent window (width of the control pulse) becomes shorter according to the propagation, the width of the control pulse should be set broader than that of the signal pulse. As an example, we assume the case where a 1.6-µm, 100-fs signal pulse is gated by a 300-fs control pulse at a wavelength of 1.5 µm in a 500-µm length waveguide. A 140-fs gated signal pulse with a smooth envelope is expected to appear after the band-pass filter. The extinction ratio is expected to be greater than 15 dB.},
keywords={},
doi={},
ISSN={},
month={June},}
부
TY - JOUR
TI - FDTD Simulation of Femtosecond Optical Gating in Nonlinear Optical Waveguide Utilizing Intersubband Transition in AlGaN/GaN Quantum Wells
T2 - IEICE TRANSACTIONS on Electronics
SP - 981
EP - 988
AU - Nobuo SUZUKI
AU - Norio IIZUKA
AU - Kei KANEKO
PY - 2000
DO -
JO - IEICE TRANSACTIONS on Electronics
SN -
VL - E83-C
IS - 6
JA - IEICE TRANSACTIONS on Electronics
Y1 - June 2000
AB - The propagation and the gate operation of femtosecond pulses in nonlinear optical waveguides utilizing the saturation of the intersubband absorption at 1.55 µm in nitride multiple quantum wells are simulated for the first time. The calculation was carried out by a one-dimensional finite-difference time-domain (FD-TD) method combined with three-level rate equations describing the intersubband carrier dynamics. The absorption recovers within 1 ps when the pulse width is less than 200 fs, which will allow 1-Tb/s operation. However, the pulse shape may be deformed with the propagation due to the coherent effect and the interference between the signal and the control pulses, and thus, optimization of the pulse widths and the incident timing is required. Since the transparent window (width of the control pulse) becomes shorter according to the propagation, the width of the control pulse should be set broader than that of the signal pulse. As an example, we assume the case where a 1.6-µm, 100-fs signal pulse is gated by a 300-fs control pulse at a wavelength of 1.5 µm in a 500-µm length waveguide. A 140-fs gated signal pulse with a smooth envelope is expected to appear after the band-pass filter. The extinction ratio is expected to be greater than 15 dB.
ER -