VERTICAL CAVITY SURFACE EMITTING LASER (VCSEL)
First Claim
1. A vertical cavity surface emitting laser emitting light at a first wavelength longer than a second wavelength of the light used for optically pumping it comprising a substrate supporting a stack of layers, the stack comprising in turn:
- a first section forming a first mirror highly reflective of the light of the second wavelength;
a second section forming the cavity of a laser emitting at the second wavelength and including the gain medium of the laser;
a third section forming a second mirror reflective of the light of the second wavelength and partially transmissive of light of said second wavelength, the first, second, and third sections forming a vertical cavity surface emitting laser emitting at the second wavelength;
a fourth section forming a mirror highly reflective of the first wavelength and transmissive to light of the second wavelength;
a fifth section forming the cavity of the laser emitting at the first wavelength and including the gain medium of such laser; and
a sixth section forming a mirror reflective of the first and second wavelengths and partially transmissive of light of the first wavelength, characterized in that the third and sixth are spaced to establish a standing wave of the second wavelength therebetween and that the first, second, third, fourth, and fifth sections are epitaxial with a substrate.
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Accused Products
Abstract
A vertical cavity surface emitting laser emitting at about 1.3 microns while being optically pumped by a vertical cavity surface emitting laser emitting at about 8.1 nanometers characterized in that the resonant cavities of the two lasers are coupled to increase the effectiveness of the pumping light to stimulate emission from the gain medium of the long-wavelength medium. The two lasers are formed in a multilayer stack of which all the layers are epitaxial except for the layers at the top of the stack that serve as a broad band output mirror and the upper bounding of the long wavelength laser.
44 Citations
6 Claims
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1. A vertical cavity surface emitting laser emitting light at a first wavelength longer than a second wavelength of the light used for optically pumping it comprising
a substrate supporting a stack of layers, the stack comprising in turn: -
a first section forming a first mirror highly reflective of the light of the second wavelength;
a second section forming the cavity of a laser emitting at the second wavelength and including the gain medium of the laser;
a third section forming a second mirror reflective of the light of the second wavelength and partially transmissive of light of said second wavelength, the first, second, and third sections forming a vertical cavity surface emitting laser emitting at the second wavelength;
a fourth section forming a mirror highly reflective of the first wavelength and transmissive to light of the second wavelength;
a fifth section forming the cavity of the laser emitting at the first wavelength and including the gain medium of such laser; and
a sixth section forming a mirror reflective of the first and second wavelengths and partially transmissive of light of the first wavelength, characterized in that the third and sixth are spaced to establish a standing wave of the second wavelength therebetween and that the first, second, third, fourth, and fifth sections are epitaxial with a substrate. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification