Sensitivity of optically preamplified receivers with optical filtering

Steele, R.C.; Walker, Gordon J.; Walker, N.G.

doi:10.1109/68.91030

Cited by 51 publications

(17 citation statements)

References 7 publications

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“…In the other case, when the second term of (1) dominates i.e. in the ASE noise limited regime, the waveguide-coupled receiver sensitivity can be approximated as [11]:…”

Section: Discussionmentioning

confidence: 99%

Optically pre-amplified photodetectors for multi-guide vertical integration in InP

Tolstikhin

Watson

et al. 2009

2009 IEEE International Conference on Indium Phosphide &Amp; Related Materials

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Figure 1. A schematic of an OPAD building block and a functional equivalent featuring a semicondutor optical amplifier, a passband filter and a PIN photodetector. Inset: a scanning electron micrograph of a tapered activepassive waveguide transition area of the OPAD chip. AbstractAn integrated optically pre-amplified photodetector, featuring waveguide gain and absorption sections defined on the same active waveguide layers atop a common passive waveguide, is reported. The device demonstrates high responsivity while exhibiting little polarization sensitivity

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“…In the other case, when the second term of (1) dominates i.e. in the ASE noise limited regime, the waveguide-coupled receiver sensitivity can be approximated as [11]:…”

Section: Discussionmentioning

confidence: 99%

Optically pre-amplified photodetectors for multi-guide vertical integration in InP

Tolstikhin

Watson

et al. 2009

2009 IEEE International Conference on Indium Phosphide &Amp; Related Materials

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“…These are the RIN of the input lightwave, the noise of the EDFAs, the shot and thermal noise of the photodiode. The optical spontaneous emission noise power spectral density (PSD) of a single high gain EDFA [10] is given by Pectra = hvGF/2, where his the Planck's constant, vis the frequency of the input lightwave, G (» 1) is the gain of the EDFA, F is the noise figure of an ED FA. The spontaneous emission of EDFA introduces three kinds of noise [10] at the output of the photodiode which are amplified spontaneous emission (ASE)-ASE beat noise, ASE-shot noise and signal-ASE beat noise.…”

Section: Discussionmentioning

confidence: 99%

Subcarrier Multiple Access Fiber-optic mm-Wave Radio using Cascaded Mach-Zehnder Interferometric Square-law Modulators

Taraprasad¹,

Bhattacharya²

2002

Journal of Optical Communications

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In this paper, we propose a scheme for subcarrier multiple access (SCMA) fiber-optic mm-wave radio using cascaded Mach-Zehnder (M-Z) interferometric squarelaw light intensity modulators. This scheme finds application in wireless CATV. The microwave subcarriers are frequency modulated by the video signals. Using the subcarrier voltage amplitude equal to 6 % of the modulator half-wave voltage and 50 mm-wave subcarrier channels, the mm-wave composite triple beat power to mmwave subcarrier power ratio at the input of the base station antenna has been calculated to be -42 dB. The mm-wave carrier-to-noise power ratio at the input of the base station antenna has been calculated to have a value of 14 dB for 6% normalized subcarrier voltage (NSV) and 50 subcarrier channels. The proposed fiber-optic mm-wave radio thus meets the requirements of a CATV system.

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“…The calculation of SNR of the stealth channel is fundamentally different from the calculation of SNR of the public channel. In the public channel, the noise comes from thermal noise, shot noise, and beating noise from ASE after the public signal goes through optical amplifiers [38,39]. The shot noise variance is proportional to the optical signal power of the public channel, while the thermal noise and beating noise do not depend on the signal power of the public channel.…”

Section: Signal To Noise Ratio Analysis Of Optical Steganographymentioning

confidence: 99%

Amplifier Noise Based Optical Steganography with Coherent Detection

Wu¹,

Chang²,

Caldwell³

et al. 2014

Coherent Phenomena

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Abstract:We summarize the principle and experimental setup of optical steganography based on amplified spontaneous emission (ASE) noise. Using ASE noise as the signal carrier, optical steganography effectively hides a stealth channel in both the time domain and the frequency domain. Coherent detection is used at the receiver of the stealth channel. Because ASE noise has short coherence length and random phase, it only interferes with itself within a very short range. Coherent detection requires the stealth transmitter and stealth receiver to precisely match the optical delay, which generates a large key space for the stealth channel. Several methods to further improve optical steganography, signal to noise ratio, compatibility with the public channel, and applications of the stealth channel are also summarized in this review paper.

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Sensitivity of optically preamplified receivers with optical filtering

Cited by 51 publications

References 7 publications

Optically pre-amplified photodetectors for multi-guide vertical integration in InP

Optically pre-amplified photodetectors for multi-guide vertical integration in InP

Subcarrier Multiple Access Fiber-optic mm-Wave Radio using Cascaded Mach-Zehnder Interferometric Square-law Modulators

Amplifier Noise Based Optical Steganography with Coherent Detection

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