Abstract

This letter describes a novel optical method for wavelength fine-selection in the optical spectrum analysers (OSAs) for dense wavelength division multiplexing (DWDM) applications. The proposed new method employs a 'refractive optical lever' system consisting of a rotating optical wedge prism. A new OSA system based on Littman-type monochromator is proposed and the wavelength selection accuracy and resolution of OSA that has included such an optical lever system have been improved by a factor of 20 to 100 depending on the wedge angle and offset orientation angle of the optical wedge prism. This proposed 'refractive optical lever' may also simplify the rotation mechanism of the mirror in the commercially available OSAs.

© 2005 Chinese Optics Letters

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References

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  1. G. Levesque (EXFO), Photonics Spectra 34, 106 (2000).
  2. S. V. Kartalopoulos, DWDM: Networks, Devices, and Technology (Wiley-IEEE Press, 2002).
  3. K. R. Wildnauer and Z. Azary, Hewlett-Packard Journal 44, 68 (1993).
  4. Yokogawa Electronic Corporation (Japan), "Optical spectrum analyser and spectroscope" International Patent Number WO9628713A1 (1996).
  5. Oxford Fibre Optics Tools Ltd. (UK), "Optical spectrum analyser" International Patent Application Number PCT/GB00/00496 (1999).
  6. T. D. Liao and R. Chaney, "Wavelength tuning in external cavity lasers" International Patent WO 01/73905 (October 4, 2001).

2000 (1)

G. Levesque (EXFO), Photonics Spectra 34, 106 (2000).

1993 (1)

K. R. Wildnauer and Z. Azary, Hewlett-Packard Journal 44, 68 (1993).

(EXFO), G. Levesque

G. Levesque (EXFO), Photonics Spectra 34, 106 (2000).

Azary, Z.

K. R. Wildnauer and Z. Azary, Hewlett-Packard Journal 44, 68 (1993).

Wildnauer, K. R.

K. R. Wildnauer and Z. Azary, Hewlett-Packard Journal 44, 68 (1993).

Hewlett-Packard Journal (1)

K. R. Wildnauer and Z. Azary, Hewlett-Packard Journal 44, 68 (1993).

Photonics Spectra (1)

G. Levesque (EXFO), Photonics Spectra 34, 106 (2000).

Other (4)

S. V. Kartalopoulos, DWDM: Networks, Devices, and Technology (Wiley-IEEE Press, 2002).

Yokogawa Electronic Corporation (Japan), "Optical spectrum analyser and spectroscope" International Patent Number WO9628713A1 (1996).

Oxford Fibre Optics Tools Ltd. (UK), "Optical spectrum analyser" International Patent Application Number PCT/GB00/00496 (1999).

T. D. Liao and R. Chaney, "Wavelength tuning in external cavity lasers" International Patent WO 01/73905 (October 4, 2001).

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