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limits on achievable dimensional and photon efficiencies with intensity-modulation and photon-counting due to non-ideal photon-counter behaviorAn ideal intensity-modulated photon-counting channel can achieve unbounded photon information efficiencies (PIEs). However, a number of limitations of a physical system limit the practically achievable PIE. In this paper, we discuss several of these limitations and illustrate their impact on the channel. We show that, for the Poisson channel, noise does not strictly bound PIE, although there is an effective limit, as the dimensional information efficiency goes as e[overline] e PIE beyond a threshold PIE. Since the Holevo limit is bounded in the presence of noise, this illustrates that the Poisson approximation is invalid at large PIE for any number of noise modes. We show that a finite transmitter extinction ratio bounds the achievable PIE to a maximum that is logarithmic in the extinction ratio. We show how detector jitter limits the ability to mitigate noise in the PPM signaling framework. We illustrate a method to model detector blocking when the number of detectors is large, and illustrate mitigation of blocking with spatial spreading and altering. Finally, we illustrate the design of a high photon efficiency system using state-of-the-art photo-detectors and taking all these effects into account.
Document ID
20130009358
Document Type
Conference Paper
External Source(s)
Authors
Moision, Bruce
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Erkmen, Baris I.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Farr, William
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Dolinar, Samuel J.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Birnbaum, Kevin M.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 27, 2013
Publication Date
January 24, 2012
Subject Category
Optics
Meeting Information
SPIE Photonics West(San Francisco, CA)
Funding Number(s)
CONTRACT_GRANT: JPL 97-15402
Distribution Limits
Public
Copyright
Other
Keywords
quantum limited communications
photon counting detection
optical communications
photon information effieciency