We have fabricated and experimentally tested low-cost and mass-producible multimode fiber-optic couplers and connectors based on nonimaging beam-expanding optics and Liouville’s theorem. Analysis indicates that a pair coupling loss of −0.25 dB can be achieved. Experimentally, we measured insertion losses as low as −0.38 dB. The beam expanders can be mass produced owing to the use of plastic injection-molding fabrication techniques and packaged in standard connector housings. This design is compatible with the fiber geometry and can yield highly stable coupling owing to its high tolerance for misalignments.
© 1989 Optical Society of America
Original Manuscript: May 15, 1989
Manuscript Accepted: September 26, 1989
Published: December 1, 1989
Behzad Moslehi, Joel Ng, Ivan Kasimoff, and Tomasz Jannson, "Fiber-optic coupling based on nonimaging expanded-beam optics," Opt. Lett. 14, 1327-1329 (1989)