Patent ID: 7417789
Filing Date: 2008-08-26
Classification: H01S

Abstract:
1. A solar-pumped active device, comprising: a substrate; an optical diffraction element; a first optical reflection element; an optical gain medium; an optical waveguide; an input port; an output port; an anti-reflection film; and a reflection layer, wherein said substrate is covered with said reflection layer and on said substrate are said first optical reflection element, said optical waveguide and said anti-reflection film; wherein a required wavelength in sunlight is coupled by said optical diffraction element on said substrate and said first optical reflection element in said optical waveguide and then said wavelength is converged to said optical gain medium; and wherein, accordingly, an amplifier is obtained by amplifying the input signals from said input port and outputting said input signals by said output port, wherein said optical diffraction element is a holographic antenna grating.