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Over the last one to two decades, there has been a lot of interest and research in optical CDMA systems. More than 250 papers have been written in this area since 1985 [12]. A vast number of different schemes using time domain or... more
Over the last one to two decades, there has been a lot of interest and research in optical CDMA systems. More than 250 papers have been written in this area since 1985 [12]. A vast number of different schemes using time domain or frequency domain encoding ...
Research Interests: Signal Processing, Fiber Optics, System Design, Optical switching, Communication System, and 15 morePerformance Analysis, Optical Communications, optical CDMA, Optical Communication System, Optical Code Division Multiple Access, Spread Spectrum, Multiplexing, Shot Noise, Transfer Function, Optical fiber, Speckle noise, Fiber Optic, Optical Code Division Multiplexing Access, Code Division Multiple Access, and Cumulant
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... I would like to thank my colleagues Bikash Koley, Valey Kamalov, Xiaoxue Zhao and my manager Vijay Gill for helpful ... Requirements for Data Center Interconnects,” paper TuA2, 20th Annual Workshop on Interconnections within High... more
... I would like to thank my colleagues Bikash Koley, Valey Kamalov, Xiaoxue Zhao and my manager Vijay Gill for helpful ... Requirements for Data Center Interconnects,” paper TuA2, 20th Annual Workshop on Interconnections within High Speed Digital Systems, Santa Fe, New ...
... I would like to thank my colleagues Bikash Koley, Valey Kamalov, Xiaoxue Zhao and my manager Vijay Gill for helpful ... IRU 'DWD &HQWHU ,QWHUFRQQHFWV ´ paper TuA2, 20th Annual Workshop on Interconnections within High Speed... more
... I would like to thank my colleagues Bikash Koley, Valey Kamalov, Xiaoxue Zhao and my manager Vijay Gill for helpful ... IRU 'DWD &HQWHU ,QWHUFRQQHFWV ´ paper TuA2, 20th Annual Workshop on Interconnections within High Speed Digital Systems, Santa Fe, New Mexico ...
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In this paper, we describe a fast wavelength hoped optical code division multiple access (CDMA) scheme employing a balanced detector to enable bipolar signaling and achieve true orthogonality in non-coherent systems. The idea can be used... more
In this paper, we describe a fast wavelength hoped optical code division multiple access (CDMA) scheme employing a balanced detector to enable bipolar signaling and achieve true orthogonality in non-coherent systems. The idea can be used to construct secure wavelength hopped CDMA systems. We give the interference analysis for randomly chosen codes.
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Research Interests:
We demonstrate a composite packet switched network serving 5 source destination-pairs. Packets are multiplexed both in time and in wavelength resulting in maximum network reconfigurability without the need for tunable receivers.
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Summary form only given. Recently, there has been tremendous interest in applying spread spectrum and code division multiple access (CDMA) techniques in optical fiber communication systems. Contrary to radio CDMA systems, which employs... more
Summary form only given. Recently, there has been tremendous interest in applying spread spectrum and code division multiple access (CDMA) techniques in optical fiber communication systems. Contrary to radio CDMA systems, which employs electric-field encoding and correlation to achieve orthogonality, most of the optical communication systems use intensity modulation and direct detection. To achieve true orthogonality in optical CDMA systems,
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... Cedric F. Lam, Misha Boroditsky, Mark D. Feuer+, Nicholas J. Frigo, and Bhavesh Desai, and Jin Kang* AT&T Labs -Research, 200 S. Laurel Ave., Middletown, NJ 07748, USA, cflam@ieee.org t JDS Uniphase, 100 Willbrook Road, Bldg. ...
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Development in the WDM technologies has made multi-wavelength optical sources and components available. By combining WDM mux-demux and fast electro-optic switches, a fast configurable WDM add-drop filter can be obtained. This enables... more
Development in the WDM technologies has made multi-wavelength optical sources and components available. By combining WDM mux-demux and fast electro-optic switches, a fast configurable WDM add-drop filter can be obtained. This enables using WDM with TDM in a way that each TDM time slot is also wavelength multiplexed. Hence introducing a second dimension for switching in addition to the time
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The ability to select an arbitrary wavelength out of a large set of wavelengths is important for future dense wavelength division multiple access (DWDM) systems. Current approaches use a spectrometer to demultiplex the wavelengths and use... more
The ability to select an arbitrary wavelength out of a large set of wavelengths is important for future dense wavelength division multiple access (DWDM) systems. Current approaches use a spectrometer to demultiplex the wavelengths and use a switch at each wavelength to select or deselect that particular wavelength at the output. In a DWDM system with N wavelengths, N number
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ABSTRACT In this paper we discuss integration technologies for next generation broadband optical access networks, in the context of different passive optical network architectures and the role they play to alleviate various technical and... more
ABSTRACT In this paper we discuss integration technologies for next generation broadband optical access networks, in the context of different passive optical network architectures and the role they play to alleviate various technical and economic hurdles.
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We review the trade-offs, challenges and potentials of various FTTH architecture options.
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We find that crosstalk can severely degrade transmission in a metro-scale ring with passive optical add/drop nodes. The worst degradation is in the downstream signals, which are affected by the ASE and pattern-dependent chirp of the... more
We find that crosstalk can severely degrade transmission in a metro-scale ring with passive optical add/drop nodes. The worst degradation is in the downstream signals, which are affected by the ASE and pattern-dependent chirp of the direct-modulated lasers attached to the ADD ports. Same channel crosstalk due to leakage through the FBG filter elements also plays a role. With appropriate