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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 38, Iss. 19 — Oct. 1, 2013
  • pp: 3739–3742

Monolithic bifocal zone-plate lenses for confocal collimation of laser diodes

Tong Jiang, Qi-Dai Chen, Jun Zhang, Zhen-Nan Tian, Li-Gang Niu, Qi-Song Li, Hai-Yu Wang, Li Qin, and Hong-Bo Sun  »View Author Affiliations


Optics Letters, Vol. 38, Issue 19, pp. 3739-3742 (2013)
http://dx.doi.org/10.1364/OL.38.003739


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Abstract

An elliptical monolithic bifocal zone plate as a collimating lens, whose two focal lengths in the orthogonal directions match the different beam waist positions of the fast and slow axes’ light from edge-emitting laser diodes, is proposed and experimentally demonstrated by employing femtosecond laser direct writing technology. The high-quality eight-level zone plate exhibits a diffraction efficiency of 92.9%, which is much higher than those ever reported. Shaped by the elliptical lens, the laser diodes’ divergence angles are simultaneously reduced from 65° (1134 mrad, fast axis) and 24° (418 mrad, slow axis) to 7.7 and 136.5 mrad, respectively.

© 2013 Optical Society of America

OCIS Codes
(120.4610) Instrumentation, measurement, and metrology : Optical fabrication
(230.3990) Optical devices : Micro-optical devices

ToC Category:
Optical Design and Fabrication

History
Original Manuscript: May 6, 2013
Revised Manuscript: August 24, 2013
Manuscript Accepted: August 24, 2013
Published: September 17, 2013

Citation
Tong Jiang, Qi-Dai Chen, Jun Zhang, Zhen-Nan Tian, Li-Gang Niu, Qi-Song Li, Hai-Yu Wang, Li Qin, and Hong-Bo Sun, "Monolithic bifocal zone-plate lenses for confocal collimation of laser diodes," Opt. Lett. 38, 3739-3742 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-19-3739


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