Optical waveguide monitoring

Details Optical waveguide monitoring Optical waveguide monitoring

2005-04-12

2005-04-12

Nguyen, Tu T. (Department: 2877)

Optics: measuring and testing

For optical fiber or waveguide inspection

Reexamination Certificate

active

06879386

ABSTRACT:
Techniques for monitoring the quality (e.g., optical and mechanical properties) in optical waveguides (e.g., photonic crystal fibers) are disclosed. Additionally, techniques for detecting and localizing defects in the waveguides are also described. Pulses of light are launched into one end of an optical waveguide. The amount of light scattered out of the same end of the waveguide (i.e., a backscattered or reflected signal) is monitored at certain wavelengths specific to the spectral characteristics of the waveguide. Transmission characteristics and defect localization can be determined from the backscattered signal.

REFERENCES:
patent: 3982816 (1976-09-01), Watkins
patent: 4081258 (1978-03-01), Goell et al.
patent: 4236904 (1980-12-01), Lazay
patent: 4269483 (1981-05-01), Feldtkeller
patent: 4583851 (1986-04-01), Yataki
patent: 4678327 (1987-07-01), Yoshida et al.
patent: 4793840 (1988-12-01), Harding
patent: 4890915 (1990-01-01), Byvik et al.
patent: 5172421 (1992-12-01), Nakamura et al.
patent: 5185636 (1993-02-01), Button et al.
patent: 5289265 (1994-02-01), Inoue et al.
patent: 5449393 (1995-09-01), Tsuneishi et al.
patent: 5534994 (1996-07-01), Hanson et al.
patent: 5786891 (1998-07-01), Jakobsen et al.
patent: 5999308 (1999-12-01), Nelson et al.
Knight et al, All-silica single-mode optical fiber with photonic crystal cladding, Oct. 1, 1996, vol. 21, No. 19, Optics Letters.*
Gander et al. “Experimental measurement of group velocity dispersion in photonic crystal fiber”, Electronics Letters, vol. 35, No. 1, Jan. 7, 1999, pp. 63-64.*
C. Martijn de Sterke et al., “Differential losses in Bragg fibers,” J. Appl. Phys. 76 (2) pp. 680-688, Jul. 15, 1994.
T. A. Birks et al., “Full 2-D photonic bandgaps in silica/air structure,” Electronics Letters, vol. 31, No. 22, pp. 1941-1943, Oct. 26, 1995.
T. Erdogan et al., “Circularly symmetric operation of a concentric-circle-grating, surface-emitting, A1GaAs/GaAs quantum-well semiconductor laser,” Appl. Phys. Lett. 60 (16) pp. 1921-1923, Apr. 20, 1992.
Y. Fink et al., “Guiding optical light in air using an all-dielectirc structure,” Journal of Lightwave Technology, vol. 17, No. 11, pp. 2039-2041, Nov. 1999.
Stig E. Barkou et al., “Silica-air photonic crystal fiber design that permits waveguiding by a true photonic bandgap effect,” Optics Letters, vol. 24, No. 1, pp. 46-48, Jan. 1, 1999.
J. C. Knight et al., “Photonic band gap guidance in optical fibers,” SCIENCE, vol. 282, pp. 1476-1478, Nov. 20, 1998.
2001 OmniGuide Long-Haul Fiber, OmniGuide Communications Inc., Cambridge, MA.
2001 OmniGuide Passive Electromagnetic Mode Conversion in Multi-mode Waveguides and Optical Fibers, Cambridge, MA.
P. Yeh et al., “Theory of Bragg Fiber”, J. Opt. Soc. Am., vol. 68, pp. 1196, 1978.
M. K. Barnoski et al., Applied Optics, vol. 16, pp. 2375, 1977.

Affiliated with

Also associated with

Rating

Optical waveguide monitoring does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical waveguide monitoring, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical waveguide monitoring will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3374436