Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1996-10-03
1998-06-30
Pascal, Leslie
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359127, 359193, 359189, H04B 1006
Patent
active
057742430
ABSTRACT:
Disclosed in this application is a method for correcting the relation between a control signal for controlling a selecting wavelength of an optical filter and the selecting wavelength of the optical filter. In the present invention, the selecting wavelength of the optical filter is swept in a wavelength range comprising wavelengths of light of first and second wavelengths generated by optical frequency modulation, and the above correction is carried out based on a difference between values of the control signal when the light of the first and second wavelengths is selected. A wavelength difference is normally controlled with high accuracy between light of two wavelengths generated by optical frequency modulation, and the present invention thus involves performing the above correction based on the wavelength gap controlled with high accuracy.
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Kotaki, Y., et al., "Long Cavity .lambda./4 Shifted MQW-DFB Laser with Three Electrodes," Institute of Electronics, Information and Communication Engineers (IEICE), QQE 89-116, vol. 89, No. 329, pp. 60-66 (Dec. 1989).
Canon Kabushiki Kaisha
Pascal Leslie
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