Suppressing Rayleigh backscatter and code noise from all-fiber digital interferometers

Silvie Ngo; Daniel A. Shaddock; Terry G. McRae; Timothy T.Y. Lam; Jong H. Chow; Malcolm B. Gray

doi:10.1364/OL.41.000084

Suppressing Rayleigh backscatter and code noise from all-fiber digital interferometers

Silvie Ngo^*, Daniel A. Shaddock, Terry G. McRae, Timothy T.Y. Lam, Jong H. Chow, Malcolm B. Gray

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

We configure an all-fiber digital interferometer to eliminate both code noise and Rayleigh backscatter noise from bidirectional measurements. We utilize a sawtooth phase ramp to upconvert code noise beyond our signal bandwidth, demonstrating an in-band noise reduction of approximately two orders of magnitude. In addition, we demonstrate, for the first time to our knowledge, the use of relative code delays within a digital-interferometer system to eliminate Rayleigh-backscatter noise, resulting in a noise reduction of a factor of 50. Finally, we identify double Rayleigh-backscatter noise as our limiting noise source and suggest two methods to minimize this noise source.

Original language	English
Pages (from-to)	84-87
Number of pages	4
Journal	Optics Letters
Volume	41
Issue number	1
DOIs	https://doi.org/10.1364/OL.41.000084
Publication status	Published - 1 Jan 2016

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title = "Suppressing Rayleigh backscatter and code noise from all-fiber digital interferometers",

abstract = "We configure an all-fiber digital interferometer to eliminate both code noise and Rayleigh backscatter noise from bidirectional measurements. We utilize a sawtooth phase ramp to upconvert code noise beyond our signal bandwidth, demonstrating an in-band noise reduction of approximately two orders of magnitude. In addition, we demonstrate, for the first time to our knowledge, the use of relative code delays within a digital-interferometer system to eliminate Rayleigh-backscatter noise, resulting in a noise reduction of a factor of 50. Finally, we identify double Rayleigh-backscatter noise as our limiting noise source and suggest two methods to minimize this noise source.",

author = "Silvie Ngo and Shaddock, {Daniel A.} and McRae, {Terry G.} and Lam, {Timothy T.Y.} and Chow, {Jong H.} and Gray, {Malcolm B.}",

note = "Publisher Copyright: {\textcopyright} 2015 Optical Society of America.",

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T1 - Suppressing Rayleigh backscatter and code noise from all-fiber digital interferometers

AU - Ngo, Silvie

AU - Shaddock, Daniel A.

AU - McRae, Terry G.

AU - Lam, Timothy T.Y.

AU - Chow, Jong H.

AU - Gray, Malcolm B.

PY - 2016/1/1

Y1 - 2016/1/1

N2 - We configure an all-fiber digital interferometer to eliminate both code noise and Rayleigh backscatter noise from bidirectional measurements. We utilize a sawtooth phase ramp to upconvert code noise beyond our signal bandwidth, demonstrating an in-band noise reduction of approximately two orders of magnitude. In addition, we demonstrate, for the first time to our knowledge, the use of relative code delays within a digital-interferometer system to eliminate Rayleigh-backscatter noise, resulting in a noise reduction of a factor of 50. Finally, we identify double Rayleigh-backscatter noise as our limiting noise source and suggest two methods to minimize this noise source.

AB - We configure an all-fiber digital interferometer to eliminate both code noise and Rayleigh backscatter noise from bidirectional measurements. We utilize a sawtooth phase ramp to upconvert code noise beyond our signal bandwidth, demonstrating an in-band noise reduction of approximately two orders of magnitude. In addition, we demonstrate, for the first time to our knowledge, the use of relative code delays within a digital-interferometer system to eliminate Rayleigh-backscatter noise, resulting in a noise reduction of a factor of 50. Finally, we identify double Rayleigh-backscatter noise as our limiting noise source and suggest two methods to minimize this noise source.

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VL - 41

SP - 84

EP - 87

JO - Optics Letters

JF - Optics Letters

IS - 1

ER -

Suppressing Rayleigh backscatter and code noise from all-fiber digital interferometers

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