Optical low coherence reflectometer using [3/spl times/3] fiber coupler
1994; Institute of Electrical and Electronics Engineers; Volume: 6; Issue: 8 Linguagem: Inglês
10.1109/68.313080
ISSN1941-0174
AutoresK. Takada, Hiroaki Yamada, M. Horiguchi,
Tópico(s)Optical Network Technologies
ResumoThis letter reports that a high-sensitivity OLCR incorporating a balanced detection scheme can be constructed using only one [3/spl times/3] fiber coupler, instead of a cascade connection of a few [2/spl times/2] fiber couplers. This is because two ports on the input side of the coupler can be used to perform balanced detection. A shot-noise limited sensitivity of -152 dB could be achieved without paying special attention to reducing reflection at the local oscillator port. >
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