Integral optical fiber coupler

Details Integral optical fiber coupler Integral optical fiber coupler

G - Physics

02

B

88/97.5

G02B 6/26 (2006.01) G02B 6/42 (2006.01)

Patent

CA 1255525

INTEGRAL OPTICAL FIBER COUPLER Abstract A device for transferring high energy electromagnetic radiation from a laser to an optical fiber, which comprises a cone-shaped coupler having a wide proximal end and a narrow distal end, wherein the proximal end is in the form of a convex surface which acts as a focussing lens adapted to receive radiation from a laser and to transmit said radiation into and through said optical fiber and the distal end is attached to the input end of the optical fiber to form an integral assembly therewith, said cone-shaped coupler being made from a material having the same refractive index as that of the optical fiber and having a taper angle .theta. defined by the equation 19= sin-1 Image , wherein N.A. is the numerical aperture of the fiber material and µ is the refractive index of the material of the coupler at the wavelength of the incident radiation. A process for removing an obstruction by iaser surgery using said device is also disclosed.

503599

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