GRIN fiber lenses
First Claim
Patent Images
1. An apparatus, comprising:
- a GRIN fiber lens having a silica-glass core whose refractive index has a radial profile, the profile has a radial second derivative whose average magnitude in the core is less than about 1.7×
10−
6 microns−
2 times the value of the refractive index on the axis of the GRIN fiber lens.
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Abstract
A GRIN fiber lens has a silica-glass core whose refractive index has a radial profile. The profile has a radial second derivative whose average magnitude in the core is less than about 1.7×10−6 microns−2 times the value of the refractive index on the axis of the GRIN fiber lens.
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Citations
12 Claims
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1. An apparatus, comprising:
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a GRIN fiber lens having a silica-glass core whose refractive index has a radial profile, the profile has a radial second derivative whose average magnitude in the core is less than about 1.7×
10−
6 microns−
2 times the value of the refractive index on the axis of the GRIN fiber lens.- View Dependent Claims (2, 3, 4, 5, 6, 7)
an optical fiber having a non-GRIN core and a cladding; and
wherein the fiber lens is attached to one end of the optical fiber.
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8. An apparatus, comprising:
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a first optical fiber;
a first GRIN fiber lens attached to the first optical fiber;
a second optical fiber;
a second GRIN fiber lens attached to the second optical fiber; and
an optical device capable of directing a portion of a light beam emitted from a free end of the first GRIN fiber lens to the second GRIN fiber lens; and
wherein the GRIN fiber lenses have silica-glass cores and refractive indexes with radial profiles, the profiles having radial second derivatives with average magnitudes in cores of less than about 1.7×
10−
6 microns−
2 times the refractive index on the axes of the respective GRIN fiber lenses.- View Dependent Claims (9, 10, 11, 12)
a micro-electro-mechanical controller physically coupled to the optical device.
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11. The apparatus of claim 8, further comprising:
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a third optical fiber;
a third GRIN fiber lens attached to the third optical fiber; and
wherein the optical device is capable of directing a portion of a light beam emitted from the free end of the first GRIN fiber lens to the third GRIN fiber lens.
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12. The apparatus of claim 8, wherein the bulk optical device is capable of intercepting a light beam emitted by of the first GRIN lens at a point within a Rayleigh range of the beam'"'"'s waist.
Specification