|
related topics |
{photon, photons, single} |
{light, field, probe} |
{temperature, thermal, energy} |
{qubit, qubits, gate} |
{key, protocol, security} |
{time, decoherence, evolution} |
{error, code, errors} |
{trap, ion, state} |
{field, particle, equation} |
{cos, sin, state} |
|
Multiphoton discrimination at telecom wavelength with charge integration
photon detector
Mikio Fujiwara, Masahide Sasaki
abstract: We present a charge integration photon detector (CIPD) that enables the
efficient measurement of photon number states at the telecom-fiber wavelengths
with a quantum efficiency of 80% and a resolution less than 0.5 electrons at 1
Hz sampling. The CIPD consists of an InGaAs PIN photodiode and a GaAs JFET in a
charge integration amplifier, which is cooled to 4.2 K to reduce thermal noise
and leakage current. The charge integration amplifier exhibits a low noise
level of 470 nV/Hz1/2. The dark count is as low as 500 electrons/hour.
- oai_identifier:
- oai:arXiv.org:quant-ph/0503050
- categories:
- quant-ph
- comments:
- 4 pages, 4 figures, accepted for Applied Physics letters
- doi:
- 10.1063/1.1886903
- arxiv_id:
- quant-ph/0503050
- created:
- 2005-03-03
Full article ▸
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