Patent ID: 7729394
Filing Date: 2010-06-01
Classification: G02F

Abstract:
1. A method of controlling an optical package comprising a semiconductor laser, a spectral filter, and a wavelength conversion device, wherein: the semiconductor laser is operated to generate a fundamental laser signal comprising a relatively low-frequency spectrum in a wavelength domain; the spectral filter and the wavelength conversion device are positioned along a common optical path extending from an output of the semiconductor laser; the spectral filter is characterized by a transmission curve comprising at least one local conversion minimum interposed between ascending portions of the curve in the wavelength domain; the wavelength conversion device is characterized by a conversion efficiency curve comprising at least one local conversion maximum interposed between descending portions of the curve in the wavelength domain; the wavelength conversion device is configured to convert the fundamental laser signal to a converted laser signal comprising a relatively high-frequency wavelength spectrum; the optical package is tuned such that the ascending portions of the transmission curve are at least partially aligned with the descending portions of the conversion efficiency curve in the wavelength domain; the optical package is further tuned such that the wavelength of the fundamental laser signal lies within a wavelength range corresponding to aligned portions of the ascending and descending portions of the transmission and conversion efficiency curves; and the tuning of the optical package reduces an intensity fluctuation of the converted laser signal.