PULSE MODE MODULATION IN FREQUENCY CONVERTED LASER SOURCES
摘要
<p>Methods of operating a frequency-converted laser source are disclosed. According to particular disclosed embodiments, a laser diode is driven in a pulsed mode to define pixel intensity values corresponding to desired gray scale values of image pixels in an image plane of the laser source. The pixel intensity values are a function of a laser control signal comprising a discontinuous pulse component, a relatively constant intensity component I, and a continuously variable intensity component I*. The pulse width w of the discontinuous pulse component is selected from a set of discrete available pulse widths according to a desired pixel gray scale value. A low-end pulse width w of the set of available pulse widths is established for a range of low-end pixel gray scale values and progressively larger pulse widths w are established for ranges of progressively higher pixel gray scale values. The relatively constant intensity component I makes a relatively insignificant contribution to pixel intensity at the low-end pulse width w for the range of low-end pixel gray scale values and assumes a non-zero value for enhanced conversion efficiency at the progressively larger pulse widths w established for the higher pixel gray scale values. The continuously variable intensity component I* varies according to the desired gray scale value of the selected pixel and the contributions of the relatively constant intensity component I and the pulse width w to pixel intensity.</p>
申请公布号
WO2011025848(A1)
申请公布日期
2011.03.03
申请号
WO2010US46723
申请日期
2010.08.26
申请人
LOEBER, DAVID, A., S.;SEKIGUCHI, NOBUTOSHI;RICKETTS, DANIEL, O.;CORNING INCORPORATED
发明人
LOEBER, DAVID, A., S.;SEKIGUCHI, NOBUTOSHI;RICKETTS, DANIEL, O.