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

  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:
Report Number(s):
DOE Contract Number:
Type / Phase:
Resource Type:
Technical Report
Country of Publication:
United States
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:.
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/ 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
  • This report contains the information for both the user and for computer operations. The report provides the user with the information necessary to effectively use PCBOOM. In addition, it provides the computer operations personnel with a description of the computer system and its associated environment. Two other reports provide a technical discussion of the algorithms used and a program maintenance manual.
  • The practical application of noise control technology to new and derivative conventional turboprop airplanes likely to come into service in the 1980's has been analyzed with a view to determining noise control cost/benefits. The analysis identifies feasible noise control methods, applies them to four study airplanes, and presents the noise reductions in terms of the equivalent perceived noise level at takeoff, sideline and approach locations, and the effect on the area within selected EPNL contours. Noise reductions of up to 8.3 dB for takeoff and 10.7 dB for approach are calculated for the study airplanes but, for most cases, themore » changes are less than 5 dB. Weight and cost increases associated with the noise control treatments are determined under the assumption there they are no changes to airplane performance or fuel consumption.« less
  • The PCBOOM computer program, described in this technical report, calculates the location and magnitude of sonic-boom overpressures on the ground due to supersonic flight under standard atmosphere and no wind-propagation conditions. The program is intended for environmental planners and engineers who may need to estimate the noise impact from individual flights of supersonic military aircraft. The program runs on a Zenith Z-248 personal computer and also should run on most similarly configured IBM-compatible computers. The program contains information for all current military aircraft and allows updating for additional aircraft. The user can select either 'Quick look' computations which assume steady-statemore » flight or detailed ray-tracing calculations which can handle non-steady flight and sonic-boom focus conditions. Several types of simple maneuvers can be selected for computations; the program will also handle up to ten connected straight-line segments. Flight segments from the MOAOPS library of supersonic combat training flights may also be selected. User-specified output for printer, plotter or screen includes tables of overpressures and graphic display of the sonic-boom overpressure 'footprints' on the ground. The footprint plots show the location of all ray positions that exceed overpressures of a given level. Flight track, Mach number, and altitude profile plots are also provided. This report summarizes the technical basis for PCBOOM. Two other reports provide a program users/computer operations manual and a program maintenance manual.« less
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