Outcoupler with Bragg grating and system and method using same
First Claim
Patent Images
1. A laser comprising:
- an oscillator adapted to output a beam at a first wavelength λ
1;
a power amplifier in operational alignment with said oscillator;
a loop phase conjugate mirror adapted to reflect a beam output by said amplifier with a spectrally shifted second wavelength λ
2; and
an outcoupler in alignment with said mirror, wherein the outcoupler is a Bragg grating positioned oblique to the master oscillator and power amplifier such that the outcoupler provides near 100% reflectivity at λ
1 and substantially full transmission at λ
2.
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Abstract
An outcoupler having a wavelength selective, angle sensitive element or Bragg grating and an arrangement for maintaining the element in a predetermined orientation relative to an incident beam of electromagnetic energy. The Bragg grating may be reflective or transmissive. The inventive outcoupler may be used to implement a phase conjugate master oscillator power amplifier with an oscillator; a resonator in operational alignment with the oscillator; and an outcoupler in alignment with the oscillator. In the best mode, second and third Bragg gratings are included within the oscillator and the resonator, respectively.
62 Citations
14 Claims
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1. A laser comprising:
-
an oscillator adapted to output a beam at a first wavelength λ
1;a power amplifier in operational alignment with said oscillator; a loop phase conjugate mirror adapted to reflect a beam output by said amplifier with a spectrally shifted second wavelength λ
2; andan outcoupler in alignment with said mirror, wherein the outcoupler is a Bragg grating positioned oblique to the master oscillator and power amplifier such that the outcoupler provides near 100% reflectivity at λ
1 and substantially full transmission at λ
2. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A laser system comprising:
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a master oscillator adapted to output a beam at a first wavelength λ
1;a power amplifier in operational alignment with said oscillator; a loop phase conjugate mirror in operational alignment with said amplifier, wherein said mirror includes a first Bragg grating having partial reflectivity at said first wavelength λ
1 and a high reflectivity at said second wavelength λ
2 such that a beam at said second wavelength λ
2 is generated and output by said mirror to said power amplifier; andan outcoupler in alignment with said master oscillator, said power amplifier, and said phase conjugate mirror, said outcoupler including a second Bragg grating having high reflectivity at said first wavelength λ
1 and high transmissivity at said second wavelength λ
2 and positioned to reflect said beam output by said oscillator toward said power amplifier and transmit a beam at said second wavelength λ
2 output by said power amplifier. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification
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Current AssigneeRaytheon Company (Rtx Corporation)
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Original AssigneeRaytheon Company (Rtx Corporation)
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InventorsEfimov, Oleg M., Betin, Alexander A.
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Primary Examiner(s)Keith; Jack W.
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Assistant Examiner(s)Diacou; Ari M
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Application NumberUS11/405,199Publication NumberTime in Patent Office1,324 DaysField of Search359/346, 372/108US Class Current359/346CPC Class CodesH01S 3/08009 using a diffraction gratingH01S 3/083 Ring lasers fibre ring lase...H01S 3/10076 using optical phase conjuga...H01S 3/2316 Cascaded amplifiersH01S 3/235 Regenerative amplifiersH01S 5/50 Amplifier structures not pr...
