Abstract

We propose and experimentally demonstrate an effective method to reduce near-field speckle noise at the output of a 50 <TEX>${\mu}m$</TEX> graded index multimode fiber using a short cylindrical piezoelectric transducer(PZT) vibrating in the radial direction. The fiber was coiled as tightly as possible around the mandrel of the PZT and a periodic stretching effect was caused by the radial oscillations of the actuator. The output of the optical fiber using the He-Ne laser source was intensively observed by a CCD camera. By counting all the pixels corresponding to relative intensity graded into 256 levels in the selected area and by calculating standard deviation and mean value of the intensity, we could measure the speckle contrast and vibration effect quantitatively with reduction ratio of pixels and line profile of the illuminated region. It was clearly observed that the characteristics of the speckle pattern in the vibration-on state were significantly improved over that of the vibration-off state due to time-averaged smoothing.

© 2008 Optical Society of Korea

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    [CrossRef]
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    [CrossRef]
  3. L. Wang, T. Tschudi, T. Halldorsson, and P. R. Petursson,"Speckle reduction in laser projection systems by diffractive optical elements," Appl. Opt., vol. 37, no. 10, pp. 1770-1775, 1998
    [CrossRef]
  4. J. I. Trisnadi,"Hadamard speckle contrast reduction," Opt. Lett., vol. 29, no. 1, pp. 11-13, 2004
    [CrossRef]
  5. L. I. Ardasheva, N. D. Kundikova, M. O. Sadykova, N. R. Sadykov, and V. E. Chernyakov, "Speckle mode rotation in a few mode optical fiber in a longitudinal magnetic field," Opt. Spectrosc., vol. 95, pp. 645-651, 2003
    [CrossRef]
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    [CrossRef]
  7. P. J. Kajenski, P. L. Fuhr, and D. R. Huston, "Mode Coupling and Phase Modulation in Vibrating Waveguides," IEEE J. Lightwave Technol ., vol. 10, no. 9, pp. 1297-1301, 1992
    [CrossRef]
  8. W. J. Choi, J. Na, S. Y. Ryu, B. H. Lee, and D.-S. Ko, "Realization of 3-D Topographic and Tomograpic Images with Ultrahigh-resolution Full-field Optical Coherence Tomography," J. Opt. Soc. Korea, vol. 11, no. 1, pp. 18-25, 2007
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    [CrossRef]
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    [CrossRef]
  11. C.-H. Lee, Y. Kang, Y. Sung, and J. Noh, "Measurement of Spatial Coherence Function of Laser Beam by using a Sagnac Interferometer,โ€ J. Opt. Soc. Korea, vol. 11, no. 2, pp. 71-75, 2007

2007

W. J. Choi, J. Na, S. Y. Ryu, B. H. Lee, and D.-S. Ko, "Realization of 3-D Topographic and Tomograpic Images with Ultrahigh-resolution Full-field Optical Coherence Tomography," J. Opt. Soc. Korea, vol. 11, no. 1, pp. 18-25, 2007

C.-H. Lee, Y. Kang, Y. Sung, and J. Noh, "Measurement of Spatial Coherence Function of Laser Beam by using a Sagnac Interferometer,โ€ J. Opt. Soc. Korea, vol. 11, no. 2, pp. 71-75, 2007

2005

A. P. Povilus, S. E. Olson, R. R. Mhaskar, B.-K. Teo, J. R. Guest, and G. Raithel, "Time averaging of multimode optical fiber output for a magneto-optical trap," J. Opt. Soc. Am. B, vol. 22, no. 2, pp. 311-314, 2005
[CrossRef]

2004

J. O. Kim, K. K. Hwang, and H. G. Jeong, "Radial vibration characteristics of piezoelectric cylindrical transducers," J. Sound Vib., vol. 276, pp. 1135-1144, 2004
[CrossRef]

J. I. Trisnadi,"Hadamard speckle contrast reduction," Opt. Lett., vol. 29, no. 1, pp. 11-13, 2004
[CrossRef]

2003

L. I. Ardasheva, N. D. Kundikova, M. O. Sadykova, N. R. Sadykov, and V. E. Chernyakov, "Speckle mode rotation in a few mode optical fiber in a longitudinal magnetic field," Opt. Spectrosc., vol. 95, pp. 645-651, 2003
[CrossRef]

1998

L. Wang, T. Tschudi, T. Halldorsson, and P. R. Petursson,"Speckle reduction in laser projection systems by diffractive optical elements," Appl. Opt., vol. 37, no. 10, pp. 1770-1775, 1998
[CrossRef]

1995

D. J. Anderson, R. D. Morgan, D. R. McCluskey, J. D. C. Jones, W. J. Easson, and C. A. Greated, "An optical fibre delivery system for pulsed laser particle image velocimetry illumination," Meas. Sci . Technol., vol. 6, pp. 809-1814, 1995
[CrossRef]

1992

P. J. Kajenski, P. L. Fuhr, and D. R. Huston, "Mode Coupling and Phase Modulation in Vibrating Waveguides," IEEE J. Lightwave Technol ., vol. 10, no. 9, pp. 1297-1301, 1992
[CrossRef]

1981

K.-I. Sato and K. Asatani, "Speckle Noise Reduction in Fiber Optic Analog Video Transmission Using Semiconductor Laser Diodes," IEEE Trans. Commun., vol. 29, no. 7, pp. 1017-1024, 1981
[CrossRef]

1978

S. A. Kingsley and D. E. N. Davies, "Multimode optical fibre phase modulators and discriminators: I-Theory," Electron. Lett., vol. 14, no. 11, pp. 322-325, 1978
[CrossRef]

Applied Optics

L. Wang, T. Tschudi, T. Halldorsson, and P. R. Petursson,"Speckle reduction in laser projection systems by diffractive optical elements," Appl. Opt., vol. 37, no. 10, pp. 1770-1775, 1998
[CrossRef]

Communications, IEEE Transactions on

K.-I. Sato and K. Asatani, "Speckle Noise Reduction in Fiber Optic Analog Video Transmission Using Semiconductor Laser Diodes," IEEE Trans. Commun., vol. 29, no. 7, pp. 1017-1024, 1981
[CrossRef]

Electronics Letters

S. A. Kingsley and D. E. N. Davies, "Multimode optical fibre phase modulators and discriminators: I-Theory," Electron. Lett., vol. 14, no. 11, pp. 322-325, 1978
[CrossRef]

JOSA B

A. P. Povilus, S. E. Olson, R. R. Mhaskar, B.-K. Teo, J. R. Guest, and G. Raithel, "Time averaging of multimode optical fiber output for a magneto-optical trap," J. Opt. Soc. Am. B, vol. 22, no. 2, pp. 311-314, 2005
[CrossRef]

Journal of Sound and Vibration

J. O. Kim, K. K. Hwang, and H. G. Jeong, "Radial vibration characteristics of piezoelectric cylindrical transducers," J. Sound Vib., vol. 276, pp. 1135-1144, 2004
[CrossRef]

Journal of the Optical Society of Korea

C.-H. Lee, Y. Kang, Y. Sung, and J. Noh, "Measurement of Spatial Coherence Function of Laser Beam by using a Sagnac Interferometer,โ€ J. Opt. Soc. Korea, vol. 11, no. 2, pp. 71-75, 2007

W. J. Choi, J. Na, S. Y. Ryu, B. H. Lee, and D.-S. Ko, "Realization of 3-D Topographic and Tomograpic Images with Ultrahigh-resolution Full-field Optical Coherence Tomography," J. Opt. Soc. Korea, vol. 11, no. 1, pp. 18-25, 2007

Lightwave Technology, Journal of

P. J. Kajenski, P. L. Fuhr, and D. R. Huston, "Mode Coupling and Phase Modulation in Vibrating Waveguides," IEEE J. Lightwave Technol ., vol. 10, no. 9, pp. 1297-1301, 1992
[CrossRef]

Meas. Sci. Technol.

D. J. Anderson, R. D. Morgan, D. R. McCluskey, J. D. C. Jones, W. J. Easson, and C. A. Greated, "An optical fibre delivery system for pulsed laser particle image velocimetry illumination," Meas. Sci . Technol., vol. 6, pp. 809-1814, 1995
[CrossRef]

Optics and Spectroscopy

L. I. Ardasheva, N. D. Kundikova, M. O. Sadykova, N. R. Sadykov, and V. E. Chernyakov, "Speckle mode rotation in a few mode optical fiber in a longitudinal magnetic field," Opt. Spectrosc., vol. 95, pp. 645-651, 2003
[CrossRef]

Optics Letters

J. I. Trisnadi,"Hadamard speckle contrast reduction," Opt. Lett., vol. 29, no. 1, pp. 11-13, 2004
[CrossRef]

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