Laser having a passive pulse modulator and method of making same
First Claim
1. A laser, comprising:
- a pair of end reflectors;
a resonant cavity having a gain medium disposed therein between the pair of end reflectors;
one of such reflectors having a reflectivity lower than the reflectivity of the other one of the reflectors;
the reflectors being arranged to provide a single ended output for the cavity through the one of the reflectors having the lower reflectivity; and
a saturable absorber integrally formed on the one of the reflectors having the lower reflectivity. affixed to an end of the doped fiber gain medium.
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Accused Products
Abstract
A laser having a gain medium disposed in a resonant cavity having a pair of end reflectors. One of such reflectors has a reflectivity lower than the reflectivity of the other one of the reflectors. The reflectors are arranged to provide a single ended output for the cavity through the one of the reflectors having the lower reflectivity. A saturable absorber is formed on the one of the reflectors having the lower reflectivity. With such an arrangement, fabrication of the saturable absorber on the single ended output coupler is greatly simplified. The gain medium is a doped fiber and the saturable absorber formed on the one of the reflectors having the lower reflectivity is affixed to an end of the doped fiber gain medium. With such an arrangement, a highly efficient, relatively low cost, mode locked laser is provided.
42 Citations
26 Claims
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1. A laser, comprising:
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a pair of end reflectors; a resonant cavity having a gain medium disposed therein between the pair of end reflectors; one of such reflectors having a reflectivity lower than the reflectivity of the other one of the reflectors; the reflectors being arranged to provide a single ended output for the cavity through the one of the reflectors having the lower reflectivity; and a saturable absorber integrally formed on the one of the reflectors having the lower reflectivity. affixed to an end of the doped fiber gain medium. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A laser, comprising:
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a pair of end reflectors; a resonant cavity having a gain medium disposed therein between the pair of end reflectors; one of such reflectors having a reflectivity lower than the reflectivity of the other one of the reflectors to provide a output coupler for the laser; a saturable absorber integrally formed with the output coupler as a single monolithic structure. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 25, 26)
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19. A method of forming an output structure and saturable absorber, comprising the steps of:
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providing a semiconductor substrate; epitaxially growing substrate a plurality of pairs of layers of material lattice matched to the substrate to provide a distributed Bragg reflector output structure; epitaxially forming on the distributed Bragg reflector output structure a plurality of pairs of layers of material to form a saturable absorber integrally with the distributed Bragg reflector output structure. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification