A Feedback Receive Amplifier for Optical Transmission Systems

Hullett, J.L.; Muoi, T. V.

doi:10.1109/tcom.1976.1093224

Cited by 56 publications

(11 citation statements)

References 3 publications

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“…I spent a lot of time reading the works of Howard Shaw's Stanford group [10], that included such luminaries as Michel Digonnet, Kenneth Jackson, Byoung Yoon Kim, Behad Moslehi, Steve Newton, Moshe Tur, Robert Wentworth, Robert Younquist, and sometimes involved contributions from Joseph Goodman [11]. I learned how to gain switch laser diodes to generate short tens-of-picosecond pulses [12], to detect them with high-bandwidth transimpedance receivers (pioneered by John Hullet and Tran Muoi [13], from what would later be my own department -Electrical Engineering at the University of Western Australia (UWA). I built my digital correlator and, with the later help of postdoc William Dove, we eventually published two papers describing it [14,15].…”

Section: Digital Correlators and Communications At Kentmentioning

confidence: 99%

Staying coherent after kent: From optical communications to biomedical optics

Sampson

2011

Photonic Sens

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In this paper, an overview of author's research is presented, commencing at the University of Kent under Prof. David A. Jackson. Early research in short optical pulses and fiber-optic delay-line digital correlators led to optical communications research in code-division multiple access networking. This research was based on broadband incoherent light, and this theme continued with research into spectrum-sliced wavelength-division multiplexing. In shifting from photonics research to biomedical optics and biophotonics in the late 1990s, the emphasis on exploiting broadband light continued with research in optical coherence tomography, amongst other topics. In addition to the research outcomes, how these outcomes were attained is described, including mention of the exceptional contributions of many of my colleagues.

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Section: Digital Correlators and Communications At Kentmentioning

confidence: 99%

Staying coherent after kent: From optical communications to biomedical optics

Sampson

2011

Photonic Sens

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“…The TIA, which is the dominant contributor to the outputreferred voltage noise, has a noise spectrum that rises proportionally with frequency within the amplifier bandwidth [16] and becomes constant afterward. Therefore, a lot of noise resides above the TIA cutoff frequency and some reduction of noise can be obtained by cascading the TIA with a low-pass filter with transfer function H(s).…”

Section: Analog Front Endmentioning

confidence: 99%

Nonintrusive Fiber Monitoring of TDM Optical Networks

Mulder

Chen

Bauwelinck

et al. 2007

J. Lightwave Technol.

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Abstract-This paper introduces a new embedded nonintrusive fiber-monitoring technique for time-division-multiplexing optical networks. It allows an optical transmitter to characterize the fiber plant from reflections caused by data bursts transmitted across the network instead of dedicated test signals. The probing is performed with minimal burden on data traffic so that many measurements can be averaged to improve accuracy. The method is very suitable for embedded optical time-domain reflectometers (OTDR), which reuse a network node's optical data transmitter for OTDR excitations and embed a reflectometer inside the fiber endpoint. This paper models the OTDR with Laplace transforms, an approach previously unpursued, after which it is explained how reflections from multiple data bursts with arbitrary width can be converted into one normalized format. This new class of OTDR excites the fiber with a negative step of light instead of the conventional short pulse. The signal-to-noise ratio (SNR) for backscatter and Fresnel reflections caused by the negative step and pulse are compared theoretically. It is shown that negative-step OTDR breaks the tradeoff between excitation pulsewidth and distance resolution, has a natural separation between fiber backscatter and Fresnel reflectors, and improves the SNR of nonreflective events.

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“…Since the feedback utilizes the transimpedance and since the transfer function of an optical front end is inherently a transimpedance, this configuration is quite useful in optical communication receivers (Hullet and Muoi, 1976). As a conclusion on this subject, the transimpedance amplifier represents a compromise between the wideband resistor terminated low-impedance voltage amplifier (but comparatively noisy) approach, and the high-impedance type with low-noise, but equalization dependent (Alexander, 1997).…”

Section: Receiver Architecturementioning

confidence: 99%