Ultra-high-speed phase-sensitive optical coherence reflectometer with a stretched pulse supercontinuum source

Hoseong Song, Seung Bum Cho, Dong Uk Kim, Sungho Jeong, Dug Young Kim

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We demonstrate an ultra-high-speed phase-sensitive time-wavelength-domain optical coherence reflectometer with a stretched pulse supercontinuum source. A pulsed fiber laser operating at 10MHz repetition rate was used to generate a pulsed supercontinuum of 30 ps pulse duration by using a nonlinear optical fiber. The supercontinuum pulses are stretched into 70 ns pulses with a highly dispersive fiber. With this stretched pulse source, we have built a phase-sensitive optical coherence reflectometer that measures the spectral interferogram of reflected light. By using the linear relation between the wavelength and the temporal position in a linearly chirped pulse, ultra-high-speed spectrum measurement can be obtained with this method in the time domain. We have demonstrated ultra-high-speed two-dimensional surface profiling for a standard image target and high-speed single-point monitoring for a fixed point under vibrational motion. It is shown that the measurement speed for the position of a single point can be as fast as 2:5MHz, while the position accuracy can be better than 4:49 nm.

Original languageEnglish
Pages (from-to)4000-4004
Number of pages5
JournalApplied Optics
Volume50
Issue number21
DOIs
Publication statusPublished - 2011 Jul 20

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reflectometers
Reflectometers
Light sources
Laser pulses
high speed
pulses
Wavelength
Fiber lasers
Pulsed lasers
wavelengths
fiber lasers
Optical fibers
repetition
pulsed lasers
interferometry
pulse duration
optical fibers
fibers
Fibers
Monitoring

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Cite this

Song, Hoseong ; Cho, Seung Bum ; Kim, Dong Uk ; Jeong, Sungho ; Kim, Dug Young. / Ultra-high-speed phase-sensitive optical coherence reflectometer with a stretched pulse supercontinuum source. In: Applied Optics. 2011 ; Vol. 50, No. 21. pp. 4000-4004.
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Ultra-high-speed phase-sensitive optical coherence reflectometer with a stretched pulse supercontinuum source. / Song, Hoseong; Cho, Seung Bum; Kim, Dong Uk; Jeong, Sungho; Kim, Dug Young.

In: Applied Optics, Vol. 50, No. 21, 20.07.2011, p. 4000-4004.

Research output: Contribution to journalArticle

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