Polarization-independent enhanced-resolution arrayed-waveguide grating used in spectral-domain optical low-coherence reflectometry

B.I. Akça, Lantian Chang, G. Sengo, Kerstin Worhoff, R.M. de Ridder, Markus Pollnau

Research output: Contribution to journalArticleAcademicpeer-review

8 Citations (Scopus)

Abstract

The performance of an arrayed-waveguide grating (AWG) as an integrated spectrometer in spectral-domain optical low-coherence reflectometry (SD-OLCR) is significantly improved. By removing the output waveguides of the AWG, the depth range is enhanced from 1 to 3.3 mm at 800 nm and 4.6 mm at 1300 nm. Periodic signal fading, that was previously observed in the sensitivity roll-off curve in depth ranging measurements, is shown to be evoked by beat-frequency generation between the two polarizations of partially polarized signal light in a birefringent AWG. By carefully controlling the polarization state-of-light, the signal fading is eliminated. As a permanent solution to this problem, a polarization-independent AWG is demonstrated, which can reduce the size and cost of OCLR and optical coherence tomography systems further by eliminating the components for polarization control.
Original languageEnglish
Pages (from-to)848-850
Number of pages3
JournalIEEE photonics technology letters
Volume24
Issue number10
DOIs
Publication statusPublished - May 2012

Fingerprint

Arrayed waveguide gratings
gratings
Polarization
waveguides
signal fading
polarization
Optical tomography
beat frequencies
Spectrometers
Waveguides
tomography
spectrometers
costs
output
sensitivity
Costs
curves

Keywords

  • IOMS-PIT: PHOTONICS INTEGRATION TECHNOLOGY
  • Optical Coherence Tomography
  • Optical low-coherence reflectometry
  • Arrayed waveguide grating

Cite this

Akça, B.I. ; Chang, Lantian ; Sengo, G. ; Worhoff, Kerstin ; de Ridder, R.M. ; Pollnau, Markus. / Polarization-independent enhanced-resolution arrayed-waveguide grating used in spectral-domain optical low-coherence reflectometry. In: IEEE photonics technology letters. 2012 ; Vol. 24, No. 10. pp. 848-850.
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abstract = "The performance of an arrayed-waveguide grating (AWG) as an integrated spectrometer in spectral-domain optical low-coherence reflectometry (SD-OLCR) is significantly improved. By removing the output waveguides of the AWG, the depth range is enhanced from 1 to 3.3 mm at 800 nm and 4.6 mm at 1300 nm. Periodic signal fading, that was previously observed in the sensitivity roll-off curve in depth ranging measurements, is shown to be evoked by beat-frequency generation between the two polarizations of partially polarized signal light in a birefringent AWG. By carefully controlling the polarization state-of-light, the signal fading is eliminated. As a permanent solution to this problem, a polarization-independent AWG is demonstrated, which can reduce the size and cost of OCLR and optical coherence tomography systems further by eliminating the components for polarization control.",
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Polarization-independent enhanced-resolution arrayed-waveguide grating used in spectral-domain optical low-coherence reflectometry. / Akça, B.I.; Chang, Lantian; Sengo, G.; Worhoff, Kerstin; de Ridder, R.M.; Pollnau, Markus.

In: IEEE photonics technology letters, Vol. 24, No. 10, 05.2012, p. 848-850.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Polarization-independent enhanced-resolution arrayed-waveguide grating used in spectral-domain optical low-coherence reflectometry

AU - Akça, B.I.

AU - Chang, Lantian

AU - Sengo, G.

AU - Worhoff, Kerstin

AU - de Ridder, R.M.

AU - Pollnau, Markus

PY - 2012/5

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N2 - The performance of an arrayed-waveguide grating (AWG) as an integrated spectrometer in spectral-domain optical low-coherence reflectometry (SD-OLCR) is significantly improved. By removing the output waveguides of the AWG, the depth range is enhanced from 1 to 3.3 mm at 800 nm and 4.6 mm at 1300 nm. Periodic signal fading, that was previously observed in the sensitivity roll-off curve in depth ranging measurements, is shown to be evoked by beat-frequency generation between the two polarizations of partially polarized signal light in a birefringent AWG. By carefully controlling the polarization state-of-light, the signal fading is eliminated. As a permanent solution to this problem, a polarization-independent AWG is demonstrated, which can reduce the size and cost of OCLR and optical coherence tomography systems further by eliminating the components for polarization control.

AB - The performance of an arrayed-waveguide grating (AWG) as an integrated spectrometer in spectral-domain optical low-coherence reflectometry (SD-OLCR) is significantly improved. By removing the output waveguides of the AWG, the depth range is enhanced from 1 to 3.3 mm at 800 nm and 4.6 mm at 1300 nm. Periodic signal fading, that was previously observed in the sensitivity roll-off curve in depth ranging measurements, is shown to be evoked by beat-frequency generation between the two polarizations of partially polarized signal light in a birefringent AWG. By carefully controlling the polarization state-of-light, the signal fading is eliminated. As a permanent solution to this problem, a polarization-independent AWG is demonstrated, which can reduce the size and cost of OCLR and optical coherence tomography systems further by eliminating the components for polarization control.

KW - IOMS-PIT: PHOTONICS INTEGRATION TECHNOLOGY

KW - Optical Coherence Tomography

KW - Optical low-coherence reflectometry

KW - Arrayed waveguide grating

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