| 1. |
- Yoo, S. J. B., et al.
(författare)
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Spectral phase encoded time spread optical code division multiple access technology for next generation communication networks Invited
- 2007
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Ingår i: Journal of Optical Networking. - 1536-5379. ; 6:10, s. 1210-1227
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Tidskriftsartikel (refereegranskat)abstract
- We overview and summarize the progress of the spectral phase encoded time spreading (SPECTS) optical code division multiple access (O-CDMA) technology. Recent progress included a demonstration of a 320 Gbit/s (32-user x 10 Gbit/s) all-optical passive optical network testbed based on the SPECTS O-CDMA technology and a theoretical prediction of the spectral efficiency at 100% and above. In particular, InP-based integrated photonics allows implementation of SPECTS O-CDMA transmitters and receivers monolithically integrated on a chip. The integrated InP chip technology not only allows robust and compact configurations for practical and low-cost O-CDMA network deployments but also offers code reconfigurations at rapid rates for secure communication applications.
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| 2. |
- Ji, C., et al.
(författare)
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Monolithically integrated InP-based photonic chip development for O-CDMA systems
- 2005
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Ingår i: IEEE Journal of Selected Topics in Quantum Electronics. - : Institute of Electrical and Electronics Engineers (IEEE). - 1077-260X .- 1558-4542. ; 11:1, s. 66-77
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Tidskriftsartikel (refereegranskat)abstract
- This paper discusses photonic integration efforts toward developing an InP-based inonolithically integrated photonic chip for optical code-division multiple-access (O-CDMA) system applications. The chip design includes the colliding pulsed mode (CPM) locked laser, the. Mach-Zehnder interferometer-based threshold detector (MZI), and the monolithic O-CDMA encoder/decoder chip based on array-waveguide-gratings and phase modulator arrays. The compact 4 x I cm monolithic chip can replace a complex and large O-CDMA setup based on bulk optics. The integration technique involves active-passive integration using dry etching, metal organic chemical vapor deposition growth, and lateral hydride vapor phase epitaxy regrowth technologies. The fabricated CPM showed stable 1.54 ps modelocked laser output, the MZI showed excellent O-CDMA threshold detection, and the O-CDMA encoder showed Walsh-code O-CDMA, encoding. Further, the fabricated devices showed excellent planarity, which accelerate our progress toward monolithic integration of O-CDMA systems.
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| 3. |
- Seo, S. W., et al.
(författare)
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Monolithically integrated InP photonic micro systems on a chip for O-CDMA and OAWG applications
- 2007
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Ingår i: 2007 Photonics in Switching, PS. - 142441122X - 9781424411221 ; , s. 97-98
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Konferensbidrag (refereegranskat)abstract
- A monolithically integrated InP chip for optical arbitrary waveform generation (OAWG) and/or pulse-coding/decoding is demonstrated using a 20-GHz AWG pair and 10 high-speed phase modulators. The fabrication and performance of the InP chip will be presented.
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| 4. |
- Baek, J. H., et al.
(författare)
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10-GHz and 20-GHz channel spacing high-resolution AWGs on InP
- 2009
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Ingår i: IEEE Photonics Technology Letters. - 1041-1135 .- 1941-0174. ; 21:5, s. 298-300
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Tidskriftsartikel (refereegranskat)abstract
- This letter reports on 10-GHz and 20-GHz channel-spacing arrayed waveguide gratings (AWGs) based on InP technology. The dimensions of the AWGs are 6.8 × 8.2 mm2 and 5.0 × 6.0 mm2, respectively, and the devices show crosstalk levels of 12 dB for the 10-GHz and 17 dB for the 20-GHz AWG without any compensation for the phase errors in the arrayed waveguides. The root-mean-square phase errors for the center arrayed waveguides were characterized by using an optical vector network analyzer, and are 18° for the 10-GHz AWG and 28° for the 10-GHz AWG.
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| 5. |
- Cao, J., et al.
(författare)
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A monolithic ultra-compact inp o-cdma encoder with : Planarization by hvpe regrowth
- 2006
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Ingår i: OFC/NFOEC. - : Optical Society of America. - 1557528020 - 9781557528025
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Konferensbidrag (refereegranskat)abstract
- We report a monolithic, ultra-compact optical-CDMA encoder/decoder photonic chip in InP with surface planarization by low-pressure Hydride-Vapor-Phase-Epitaxy regrowth. The chip consists of an AWG pair and eight electro-optic phase shifters and demonstrated excellent encoding operation.
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| 6. |
- Cao, J., et al.
(författare)
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A monolithic ultra-compact inp o-cdma encoder with : Planarization by hvpe regrowth
- 2005
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Ingår i: Optics InfoBase Conference Papers. - : Optics Info Base, Optical Society of America. - 1557527849 - 9781557527844
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Konferensbidrag (refereegranskat)abstract
- We report a monolithic, ultra-compact optical-CDMA encoder/decoder photonic chip in InP with surface planarization by low-pressure Hydride-Vapor-Phase-Epitaxy regrowth. The chip consists of an AWG pair and eight electro-optic phase shifters and demonstrated excellent encoding operation.
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| 7. |
- Cao, Jing, et al.
(författare)
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Demonstration of Spectral Phase O-CDMA Encoding and Decoding in Monolithically Integrated Arrayed-Waveguide-Grating-Based Encoder
- 2006
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Ingår i: IEEE Photonics Technology Letters. - 1041-1135 .- 1941-0174. ; 18:21-24, s. 2602-2604
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Tidskriftsartikel (refereegranskat)abstract
- We report on successful spectral phase encoding and decoding operation in a pair of monolithically integrated InP encoder chips, each consisting of an arrayed waveguide grating (AWG) pair and an eight-channel electrooptic phase shifter array. The monolithic fabrication process includes anisotropic reactive ion etching and planarizing hydride-vapor-phase-epitaxy lateral regrowth to realize buried hetero-waveguide structures in AWGs and phase shifters. Electrooptical modulation in the phase shifter arrays in the encoder chip achieved Walsh-code-based optical code-division multiple access (O-CDMA) encoding and decoding. The matched-code encoding-decoding operation resulted in error-free performance in the presence of an interferer, indicating good potential for O-CDMA network applications.
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| 8. |
- Cao, J., et al.
(författare)
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Error-free spectral encoding and decoding operation of InP O-CDMA encoder
- 2006
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Ingår i: 2006 Optical Fiber Communication Conference, and the 2006 National Fiber Optic Engineers Conference. - : IEEE. - 1557528039 - 9781557528032
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Konferensbidrag (refereegranskat)abstract
- We report error-free spectral encoding and decoding operation of an InP monolithic, ultra-compact optical-CDMA encoder/decoder photonic chip pair. The experimental results demonstrate the strong potential for realizing high performance O-CDMA networks with InP micro-systems.
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| 9. |
- Cao, J., et al.
(författare)
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Spectral encoding and decoding of monolithic InP OCDMA encoder
- 2005
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Ingår i: 31st European Conference on Optical Communications (ECOC 2005), 2005. - : Institution of Engineering and Technology. ; , s. 501-502
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Konferensbidrag (refereegranskat)abstract
- We report the optical-coding operation of monolithic, ultra-compact optical-CDMA encoder and decoder pair, consisting of InP based integrated AWGs and phase modulators. The encoder and decoder successfully demonstrate eight-bit Walsh code based encoding and decoding.
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| 10. |
- Fontaine, N. K., et al.
(författare)
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Determination of 20 GHz InP AWG phase errors by measurement of AWG pulse train
- 2007
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Ingår i: 2007 IEEE LEOS Annual Meeting Conference Proceedings. - : IEEE. - 142440925X - 9781424409259 ; , s. 725-726
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Konferensbidrag (refereegranskat)abstract
- The phase errors of a 20 GHz AWG fabricated on InP are determined by measuring the intensity and phase of the pulse train produced by the transmission of a short pulse through an AWG.
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