Optoelectronic 1/f noise of Avalanche Photodiodes (AlInAs/GaInAs/InP) dedicated to photonic instrumentation and telecommunication

We show for the first time, the results concerning low frequency noise (1Hz-1KHz) of Avalanche Photodiodes (eAPDs) HgCdTe manufactured on Cadmium Telluride Substrate (CdTe). 1/f and multiplication noises are increasing as a function of the multiplication coefficient with the same variation. This specific behavior is explained taking into account the physical properties of eAPDs, electron avalanche multiplication coefficient and excess noise slope coefficient versus dark current. Noise Equivalent Power of median wave infrared optoelectronic detector is proposed taking account into 1/f noise which is predominant in this optical bandwidth.

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“…The same behavior has been shown in a previous work talking about 1/f noise in InGaAs/AlInAs/InP APD's [7].…”

Section: B Noise Spectral Density Versus Frequencysupporting

confidence: 87%

1/f noise of MWIR Hg_0.7Cd_0.3 Te eAPD's used in a focal plane array

Souici¹,

Orsal

Foltz

2013

2013 22nd International Conference on Noise and Fluctuations (ICNF)

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“…Other noise sources such as optical shot noise, obscurity current shot noise, fiber thermal noise and input polarization noise are also present but are generally less significant and will be negligible [2], [3].…”

Section: Optical Intensity and Frequency Fluctuationsmentioning

confidence: 98%

“…To obtain a sufficient high Sensitivity S AO (nm/Pa), it is necessary to increase acousto mechanic S AM (nm/Pa) as shown in the relation ship (2) in §2-C. The acousto mechanic simulation shows the membrane thickness e(mm) must be ajusted by using the values given in Fig.7.…”

Section: B Noise Equivalent Power Versus Membrane Thicknessmentioning

confidence: 99%

“…In order to increase the detection area, several sensors may be located on the same line, provided that they all respond with different wavelengths, close to 1550 nm. Once they reach the reception station, the different signals are driven to a Michelson or Fabry Perot interferometer which converts wavelength variation into intensity variations detected by high sensitivity photodiode [2]. Nevertheless the photodiode converts all the variations into photocurrent signal and detects both the acoustic signal frequency, DDSO noise and the optical noise generated by the fiber laser that transmits frequency fluctuations and relative intensity noise [3].…”

Section: A Experimental Setupmentioning

confidence: 99%

“…Where A is the sensitive area, k is the fiber stiffness, S AM =(A/k) acousto-mechanical sensitity, S OM optomechanical sensitivity which is evaluated to 2,42.10 -5 [2], [3] in standard fiber, λ B is the wavelength (nm), p is the pressure (Pa) and L FL is the DFBFL length, equal to 5 cm, E=73GPa :Young's module, σ = 0.171:Poisson's coefficient, n = 1.465 effective index, P 12 = 0,252, P 11 = 0,113 Optomechanic parameters used to compute S OM . This last value is mainly determined by optical fiber and can not be changed.…”

Section: Acousto Optic and Acousto Mechanic Sensitivitiesmentioning

confidence: 99%

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Noise equivalent pressure of an novel acousto-optical system dedicated to Deep Sea

Souici

Orsal

Wattrisse

et al. 2013

2013 22nd International Conference on Noise and Fluctuations (ICNF)

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Sensors based on optical fibers have well known advantages over conventional electromechanical sensors. They offer electrically passive operation and immunity from electromagnetic fields because the fiber is entirely made with dielectric materials. We present a novel acousto-optic system structure. The pump laser, circulator and receiver system including one interferometer used as discriminator, must be placed on electronic board with low electric consumption (< 1A). It is demonstrated we can detect very low acoustic signal, the same level as Deep Sea State Zero Noise if the acoustooptical sen sitivity is sufficient high. Hence, the Noise equivalent pressure of this novel acoustooptical system is optimized .

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