Optical waveguides – With optical coupler – Particular coupling structure
Reexamination Certificate
2007-05-08
2007-05-08
Rodriguez, Armando (Department: 2828)
Optical waveguides
With optical coupler
Particular coupling structure
C385S039000
Reexamination Certificate
active
10704389
ABSTRACT:
Spot-size conversion for interfacing a first optical element having a higher refractive index to a second optical element having a lower refractive index is achieved through the use of two optical star couplers coupled to each other through a plurality of optical paths embedded in a planar waveguide. The beam from the high refractive index element is introduced into a high numerical aperture (NA) star coupler, which directs the beam through a plurality of optical paths to a second star coupler with a lower numerical aperture than the first star coupler so that its output spot-size is larger. The output port of the second star coupler is interfaced to the lower refractive index element. Wavelength selection can be provided by making non-zero path-length differences between adjacent optical paths between the two star couplers. Wavelength tunability can be provided by including phase shifters in the paths between the two star couplers to alter the effective optical lengths of the paths to selectively produce the desired phase interference pattern at the desired wavelength.
REFERENCES:
patent: 4571545 (1986-02-01), Griffin et al.
patent: 4669086 (1987-05-01), Kaede et al.
patent: 4752120 (1988-06-01), Shimizu
patent: 5319659 (1994-06-01), Hohimer
patent: 5400353 (1995-03-01), Walpole et al.
patent: 5546483 (1996-08-01), Inoue et al.
patent: 5828799 (1998-10-01), Donald
patent: 5949573 (1999-09-01), Glance
patent: 6195482 (2001-02-01), Dragone
patent: 6339664 (2002-01-01), Farjady et al.
patent: 2001/0008539 (2001-07-01), Kudo
patent: 2002/0150320 (2002-10-01), Kato
patent: 2002/0172464 (2002-11-01), Delwala
“Simultaneous CW Operation Of Shared Angular Dispersive Element WDM Lasers,” C.R. Doerr, R. Monnard, C.H. Joyner and L.W. Stulz, published in IEEE Phonotonics Technology Letters, vol. 10, No. 4, Apr. 1998.
Doerr Christopher Richard
Stulz Lawrence Warren
Finneren Rory
Lucent Technologies - Inc.
Rodriguez Armando
LandOfFree
Method and apparatus for mode conversion does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for mode conversion, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for mode conversion will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3797989