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Applied Optics

Applied Optics


  • Vol. 41, Iss. 36 — Dec. 20, 2002
  • pp: 7620–7626

Two-step K+–Na+ and Ag+–Na+ ion-exchanged glass waveguides for C-band applications

Jizuo Zou, Feng Zhao, and Ray T. Chen  »View Author Affiliations

Applied Optics, Vol. 41, Issue 36, pp. 7620-7626 (2002)

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A two-step K+–Na+ and Ag+–Na+ ion-exchange technique is introduced to fabricate single-mode channel waveguides in BK7 glass for the telecom-wavelength region. The dependencies of insertion loss, polarization-dependent loss (PDL), and bending loss of curved waveguides on channel width, diffusion time, and annealing time are investigated. Results show that postannealing is a required process for improving waveguide properties and an optimal annealing time exists. Although relatively narrow mask openings are used in most one-step ion-exchange processes, a wider channel width, to as wide as 10 µm, is preferred for this two-step method. The minimum coupling loss to/from single-mode fiber and the propagation loss is found to be 0.4 dB and 0.3 dB/cm, respectively. For 5-cm-long waveguides the PDL is less than 0.1 dB. For the S-bend structure the cosine curve exhibits apparently a lower bending loss than the double-arc curve.

© 2002 Optical Society of America

OCIS Codes
(130.3120) Integrated optics : Integrated optics devices
(230.7380) Optical devices : Waveguides, channeled

Original Manuscript: March 7, 2002
Revised Manuscript: August 26, 2002
Published: December 20, 2002

Jizuo Zou, Feng Zhao, and Ray T. Chen, "Two-step K+–Na+ and Ag+–Na+ ion-exchanged glass waveguides for C-band applications," Appl. Opt. 41, 7620-7626 (2002)

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