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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 28, Iss. 8 — Apr. 15, 2010
  • pp: 1256–1260

Mask-Free Production of Integratable Monolithic Micro Logarithmic Axicon Lenses

Xiao-Feng Lin, Qi-Dai Chen, Li-Gang Niu, Tong Jiang, Wen-Quan Wang, and Hong-Bo Sun

Journal of Lightwave Technology, Vol. 28, Issue 8, pp. 1256-1260 (2010)


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Abstract

Although unique properties such as creation of nondiffracting beams and as a result the large focal depth have been exhibited from axicon lenses, and numerous important applications in optical signal processing and imaging have been demonstrated, axicons of dimensions smaller than a hundred of micrometers have not yet been reported. It is technically quite challenging for the currently available technologies including lithography and mechanical shaping to define complicated three-dimensional surface profiles depicted by lens functions in the small scale. Here, we report the solution of the issue by use of femtosecond laser nanofabrication via two-photon polymerization of resins. Not only well-defined monolithic micro axicons are attained, they demonstrate excellent optical characteristics: the cross-sectional Besselian beam intensity distribution was found almost unchanged for at least 200$\mu$m within the focal range; imaging remains unblurred and in high contrast in a much wider range than that for a common lens. The direct laser nanowriting strategy would allow the lens integrated with other optical components produced the same way, or incorporated to an existing micro-optical system.

© 2010 IEEE

Citation
Xiao-Feng Lin, Qi-Dai Chen, Li-Gang Niu, Tong Jiang, Wen-Quan Wang, and Hong-Bo Sun, "Mask-Free Production of Integratable Monolithic Micro Logarithmic Axicon Lenses," J. Lightwave Technol. 28, 1256-1260 (2010)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-28-8-1256

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