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Title: Low-noise SiCPM Technology, Phase I Final Report

Authors:
 [1]
  1. aPeak Inc., Newton, MA (United States)
Publication Date:
Research Org.:
aPeak Inc., Newton, MA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1325546
Report Number(s):
DE-SC-0013792-092016
DOE Contract Number:
SC0013792
Type / Phase:
SBIR
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; silicon carbide; single-photon; solid state photo-multiplier; UV

Citation Formats

Vasile, Stefan. Low-noise SiCPM Technology, Phase I Final Report. United States: N. p., 2016. Web.
Vasile, Stefan. Low-noise SiCPM Technology, Phase I Final Report. United States.
Vasile, Stefan. 2016. "Low-noise SiCPM Technology, Phase I Final Report". United States. doi:.
@article{osti_1325546,
title = {Low-noise SiCPM Technology, Phase I Final Report},
author = {Vasile, Stefan},
abstractNote = {},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2016,
month = 8
}

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  • Four-wave-mixing (FWM) phase conjugation was investigated in materials that can operate at diode-laser wavelengths. Investigated were atomic cesium vapor, bulk GaAs, multiquantum well (MQW) GaAs/AlGaAs, and intracavity FWM in diode laser waveguides operating above threshold. Conjugate reflectivities up to 154% were observed in cesium for c-w pumping at about 100W/sq. cm, with signal observed over a 30-GHz bandwidth around the 852-nm hyperfine transitions. Self focusing and angular response were also investigated. Backward FWM phase conjugation at room temperature was demonstrated in bulk GaAs and MQW GaAs/AlGaAs for the first time. Reflectivities of about 0.1% were observed in both materials formore » 4 kW/sq.cm pumping. Results show that the stronger excitonic effects in MQW samples do not help FWM performance when high reflectivity (>10%) is desired because the pump fields required strongly saturate the excitonic component. Conjugate reflectivities > 2 million % were observed for FWM inside the waveguide cavity of diode lasers operating above threshold. The first demonstration of a conjugation capability in diode laser FWM, piston conjugation to correct optical path differences, was also accomplished. Detectivity of FWM was investigated to determine minimum input conditions. A ring oscillator, conjugated power amplifier was constructed and tested. Phase-conjugated doubling to produce high beam quality of the second harmonic when there are aberrations in the doubling medium was demonstrated and analyzed theoretically. Rapid turn-on of a solid-state laser was modeled to estimate thermal gradients and resulting optical distortion 2 s after start from a standby mode.« less
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