Photon-number squeezing with a noisy femtosecond fiber laser amplifier source using a collinear balanced detection technique | Zendy

Shota Sawai | Zendy; Hikaru Kawauchi | Zendy; Kenichi Hirosawa | Zendy; Fumihiko Kannari | Zendy

Open Access

Photon-number squeezing with a noisy femtosecond fiber laser amplifier source using a collinear balanced detection technique

Author(s) -

Shota Sawai,

Hikaru Kawauchi,

Kenichi Hirosawa,

Fumihiko Kannari

Publication year - 2013

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.21.025099

Subject(s) - optics , physics , optical amplifier , femtosecond , photon , amplifier , shot noise , amplified spontaneous emission , optical fiber , noise (video) , relative intensity noise , laser , optoelectronics , detector , semiconductor laser theory , computer science , cmos , artificial intelligence , image (mathematics)

We experimentally demonstrate photon-number squeezing at 1.55 μm using a noisy erbium-doped fiber amplifier (EDFA). We employ a collinear balanced detection (CBD) technique, where the intensity noise at a specific radio frequency is canceled between two pulse trains. In spite of substantially large excess noise (>10 dB) in an EDFA due to amplified spontaneous emission, we successfully cancel the intensity noise and achieve a shot noise limit at a specific radio frequency with the CBD technique. We exploit two sets of fiber polarization interferometers to generate squeezed light and observe a maximal photon-number squeezing of -2.6 dB.

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