Homodyne

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Detectors- Kazan

Photodetectors

Shot noise and thermal noise

Shot noise accompanies a flow of electric current. Any resistor at any given temperature emits thermal noise. Amplification is a nonequilibrium process, and thus amplification involves noise sources other than thermal sources.[1]

Levels of electronic shot noise for three homodyne detectors. Homodyne #1, produced by Ed ~2014-2015.
Homodyne #1, produced by Ed ~2014-2015. Shot noise levels without signal channel( pink trace), with signal applied 115MHz yellow trace, (? 15 uW)
Homodyne black, produced in Moscow 2017. Shot noise levels without signal channel( yellow trace), with signal applied with power 15 uW, and frequency 80 MHzwith respect to LO (blue trace)

Homodyne schematic

[2] [3]

Heterodyne detection

Main aspects of homodyne detection.

References

  1. ↑ Hermann Haus, Electromagnetic noise and quantum optical measurements, (/Cold Atoms/Books)
  2. ↑ Hermann Haus, Electromagnetic noise ans quantum optical measurements, (New York: Academic Press, 2005), 23-5.
  3. ↑ Hermann Haus, Electromagnetic noise ans quantum optical measurements, (New York: Academic Press, 2005), 23-5.
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