Abstract

A fiber-optic sensor, consisting of an optical fiber with and without a 1.59-mm-diameter spherical ceramic tip, inserted into a 19-mm-diameter Spectralon sphere has been characterized. This sensor is evaluated as a large-area omnidirectional sensor. An optical transport measurement system that rotates the sphere about two axes has been designed. The system measured the UV transport efficiency at 351 nm of light impinging on the sphere with an f-6 cone angle. When a bare fiber was placed at the center of the target sphere, the detection sensitivity was biased in the forward direction. The peak of the sensitivity of the inverse integrating sphere shifted from front to back as the bare fiber was withdrawn from the sphere and the numerical aperture of the fiber viewed more of the scattering volume. The response function with respect to the angle of incidence of the dual sphere was much more uniform than that obtained with a bare fiber in the center of the sphere.

© 2004 Optical Society of America

Full Article  |  PDF Article

References

  • View by:
  • |
  • |
  • |

  1. A. Pan, D. R. Biswas, “Optical properties of spherical fiber optic diffuser,” in Biomedical Fiber Optic Instrumentation, J. A. Harrington, D. M. Harris, A. Katzir, F. P. Milanovich, eds., Proc. SPIE2131, 136–144 (1994).
    [CrossRef]
  2. P. Lenz, “Light distributor for endoscopic photochomeotherapy of tumors,” Appl. Opt. 26, 4452–4456 (1987).
    [CrossRef] [PubMed]
  3. R. Sroka, W. Beyer, M. Krug, A. Noack, E. Unsold, C. Ell, “Laser-light application and light monitoring for photodynamic therapy in hollow organs,” Lasers Med. Sci. 8, 63–68 (1993).
    [CrossRef]
  4. D. Bird, M. Gu, “Two-photon fluorescence endoscopy with a micro-optic scanning head,” Opt. Lett. 28, 1552–1554 (2003).
    [CrossRef] [PubMed]
  5. K. R. Diamond, M. S. Patterson, T. J. Farrell, “Quantification of fluorophore concentration in tissue-simulating media by fluorescence measurements with a single optical fiber,” Appl. Opt. 42, 2436–2442 (2003).
    [CrossRef] [PubMed]
  6. S. Skupsky, R. S. Craxton, “Irradiation uniformity for high-compression laser-fusion experiments,” Phys. Plasmas 6, 2157–2163 (1999).
    [CrossRef]
  7. Medlight S.A., “Spherical light diffuser model SD” (Medlight S.A., CH-1024 Ecublens, Switzerland, 2003), www.medlight.com/spherical_diffusion.pdf .

2003 (2)

1999 (1)

S. Skupsky, R. S. Craxton, “Irradiation uniformity for high-compression laser-fusion experiments,” Phys. Plasmas 6, 2157–2163 (1999).
[CrossRef]

1993 (1)

R. Sroka, W. Beyer, M. Krug, A. Noack, E. Unsold, C. Ell, “Laser-light application and light monitoring for photodynamic therapy in hollow organs,” Lasers Med. Sci. 8, 63–68 (1993).
[CrossRef]

1987 (1)

Beyer, W.

R. Sroka, W. Beyer, M. Krug, A. Noack, E. Unsold, C. Ell, “Laser-light application and light monitoring for photodynamic therapy in hollow organs,” Lasers Med. Sci. 8, 63–68 (1993).
[CrossRef]

Bird, D.

Biswas, D. R.

A. Pan, D. R. Biswas, “Optical properties of spherical fiber optic diffuser,” in Biomedical Fiber Optic Instrumentation, J. A. Harrington, D. M. Harris, A. Katzir, F. P. Milanovich, eds., Proc. SPIE2131, 136–144 (1994).
[CrossRef]

Craxton, R. S.

S. Skupsky, R. S. Craxton, “Irradiation uniformity for high-compression laser-fusion experiments,” Phys. Plasmas 6, 2157–2163 (1999).
[CrossRef]

Diamond, K. R.

Ell, C.

R. Sroka, W. Beyer, M. Krug, A. Noack, E. Unsold, C. Ell, “Laser-light application and light monitoring for photodynamic therapy in hollow organs,” Lasers Med. Sci. 8, 63–68 (1993).
[CrossRef]

Farrell, T. J.

Gu, M.

Krug, M.

R. Sroka, W. Beyer, M. Krug, A. Noack, E. Unsold, C. Ell, “Laser-light application and light monitoring for photodynamic therapy in hollow organs,” Lasers Med. Sci. 8, 63–68 (1993).
[CrossRef]

Lenz, P.

Noack, A.

R. Sroka, W. Beyer, M. Krug, A. Noack, E. Unsold, C. Ell, “Laser-light application and light monitoring for photodynamic therapy in hollow organs,” Lasers Med. Sci. 8, 63–68 (1993).
[CrossRef]

Pan, A.

A. Pan, D. R. Biswas, “Optical properties of spherical fiber optic diffuser,” in Biomedical Fiber Optic Instrumentation, J. A. Harrington, D. M. Harris, A. Katzir, F. P. Milanovich, eds., Proc. SPIE2131, 136–144 (1994).
[CrossRef]

Patterson, M. S.

Skupsky, S.

S. Skupsky, R. S. Craxton, “Irradiation uniformity for high-compression laser-fusion experiments,” Phys. Plasmas 6, 2157–2163 (1999).
[CrossRef]

Sroka, R.

R. Sroka, W. Beyer, M. Krug, A. Noack, E. Unsold, C. Ell, “Laser-light application and light monitoring for photodynamic therapy in hollow organs,” Lasers Med. Sci. 8, 63–68 (1993).
[CrossRef]

Unsold, E.

R. Sroka, W. Beyer, M. Krug, A. Noack, E. Unsold, C. Ell, “Laser-light application and light monitoring for photodynamic therapy in hollow organs,” Lasers Med. Sci. 8, 63–68 (1993).
[CrossRef]

Appl. Opt. (2)

Lasers Med. Sci. (1)

R. Sroka, W. Beyer, M. Krug, A. Noack, E. Unsold, C. Ell, “Laser-light application and light monitoring for photodynamic therapy in hollow organs,” Lasers Med. Sci. 8, 63–68 (1993).
[CrossRef]

Opt. Lett. (1)

Phys. Plasmas (1)

S. Skupsky, R. S. Craxton, “Irradiation uniformity for high-compression laser-fusion experiments,” Phys. Plasmas 6, 2157–2163 (1999).
[CrossRef]

Other (2)

Medlight S.A., “Spherical light diffuser model SD” (Medlight S.A., CH-1024 Ecublens, Switzerland, 2003), www.medlight.com/spherical_diffusion.pdf .

A. Pan, D. R. Biswas, “Optical properties of spherical fiber optic diffuser,” in Biomedical Fiber Optic Instrumentation, J. A. Harrington, D. M. Harris, A. Katzir, F. P. Milanovich, eds., Proc. SPIE2131, 136–144 (1994).
[CrossRef]

Cited By

OSA participates in CrossRef's Cited-By Linking service. Citing articles from OSA journals and other participating publishers are listed here.

Alert me when this article is cited.


Figures (5)

Fig. 1
Fig. 1

Experimental setup for the optical transport coefficient of the UV beam. BBO, β-barium borate.

Fig. 2
Fig. 2

Schematic of a novel optical transport measuring device tool. The arrows indicate the rotation directions.

Fig. 3
Fig. 3

Detection sensitivity of a bare fiber. (a) The bare fiber detector was placed at the center of the sphere target. (b) The bare fiber detector was placed to detect twice the effective volume of the sphere target. The ten-inch manipulator (TIM) is a standard diagnostic fixture on the OMEGA target chamber.

Fig. 4
Fig. 4

Detection sensitivity as a function of angle for the sphere-within-a-sphere configuration. TIM, ten-inch manipulator.

Fig. 5
Fig. 5

(a) Aitoff projection of the sensitivity of the sphere-within-a-sphere configuration normalized to the average in the forward direction illustrated the distribution of nonuniformities that were measured. (b) Averaging data sets over ϕ illustrates that the dual-sphere and partially withdrawn bare fiber configurations give similar uniformities of ±10% over 160°. The largest variation occurs as the light starts to enter near the fiber axis. TIM, ten-inch manipulator.

Metrics