Ultra-high resolution strain sensing by phase-sensitive interrogation of a passive fiber Bragg resonator

Malcolm B. Gray; Jong H. Chow; Ian L.M. Littler; David E. Mcclelland

doi:10.1117/12.623272

Ultra-high resolution strain sensing by phase-sensitive interrogation of a passive fiber Bragg resonator

Malcolm B. Gray^*, Jong H. Chow, Ian L.M. Littler, David E. Mcclelland

^*Corresponding author for this work

Research output: Contribution to journal › Conference article › peer-review

5 Citations (Scopus)

Abstract

We demonstrate and compare two similar pico-strain sensing techniques by laser frequency locking to a passive Bragg grating Fabry-Perot resonator. One technique uses auxiliary phase modulation while the other employs current modulation of the diode laser source. The former is based on the Pound-Drever-Hall locking technique, while the latter is its variant, as current modulation introduces both amplitude and frequency modulation. The two modulation schemes utilize radio-frequency sidebands to derive error signals from the complex optical response of the fiber Bragg resonator. Experimental results are presented that demonstrate when the laser is locked, these methods detect differential phase shift between the optical carrier and the sidebands, due to minute fiber optical path displacements.

Original language	English
Article number	152
Pages (from-to)	623-626
Number of pages	4
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	5855 PART II
DOIs	https://doi.org/10.1117/12.623272
Publication status	Published - 2005
Event	17th International Conference on Optical Fibre Sensors, OFS-17 - Bruges, Belgium Duration: 23 May 2005 → 27 May 2005

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title = "Ultra-high resolution strain sensing by phase-sensitive interrogation of a passive fiber Bragg resonator",

abstract = "We demonstrate and compare two similar pico-strain sensing techniques by laser frequency locking to a passive Bragg grating Fabry-Perot resonator. One technique uses auxiliary phase modulation while the other employs current modulation of the diode laser source. The former is based on the Pound-Drever-Hall locking technique, while the latter is its variant, as current modulation introduces both amplitude and frequency modulation. The two modulation schemes utilize radio-frequency sidebands to derive error signals from the complex optical response of the fiber Bragg resonator. Experimental results are presented that demonstrate when the laser is locked, these methods detect differential phase shift between the optical carrier and the sidebands, due to minute fiber optical path displacements.",

keywords = "Fiber Bragg grating resonator, Frequency locking, Modulation, Strain sensing",

author = "Gray, {Malcolm B.} and Chow, {Jong H.} and Littler, {Ian L.M.} and Mcclelland, {David E.}",

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language = "English",

volume = "5855 PART II",

pages = "623--626",

journal = "Proceedings of SPIE - The International Society for Optical Engineering",

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note = "17th International Conference on Optical Fibre Sensors, OFS-17 ; Conference date: 23-05-2005 Through 27-05-2005",

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TY - JOUR

T1 - Ultra-high resolution strain sensing by phase-sensitive interrogation of a passive fiber Bragg resonator

AU - Gray, Malcolm B.

AU - Chow, Jong H.

AU - Littler, Ian L.M.

AU - Mcclelland, David E.

PY - 2005

Y1 - 2005

N2 - We demonstrate and compare two similar pico-strain sensing techniques by laser frequency locking to a passive Bragg grating Fabry-Perot resonator. One technique uses auxiliary phase modulation while the other employs current modulation of the diode laser source. The former is based on the Pound-Drever-Hall locking technique, while the latter is its variant, as current modulation introduces both amplitude and frequency modulation. The two modulation schemes utilize radio-frequency sidebands to derive error signals from the complex optical response of the fiber Bragg resonator. Experimental results are presented that demonstrate when the laser is locked, these methods detect differential phase shift between the optical carrier and the sidebands, due to minute fiber optical path displacements.

AB - We demonstrate and compare two similar pico-strain sensing techniques by laser frequency locking to a passive Bragg grating Fabry-Perot resonator. One technique uses auxiliary phase modulation while the other employs current modulation of the diode laser source. The former is based on the Pound-Drever-Hall locking technique, while the latter is its variant, as current modulation introduces both amplitude and frequency modulation. The two modulation schemes utilize radio-frequency sidebands to derive error signals from the complex optical response of the fiber Bragg resonator. Experimental results are presented that demonstrate when the laser is locked, these methods detect differential phase shift between the optical carrier and the sidebands, due to minute fiber optical path displacements.

KW - Fiber Bragg grating resonator

KW - Frequency locking

KW - Modulation

KW - Strain sensing

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DO - 10.1117/12.623272

M3 - Conference article

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VL - 5855 PART II

SP - 623

EP - 626

JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

M1 - 152

T2 - 17th International Conference on Optical Fibre Sensors, OFS-17

Y2 - 23 May 2005 through 27 May 2005

ER -

Ultra-high resolution strain sensing by phase-sensitive interrogation of a passive fiber Bragg resonator

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