Coherent laser addition using binary phase gratings
Technical Report
·
OSTI ID:5386236
Binary-phase diffraction gratings are shown to couple light coherently from a laser array into a single on-axis beam. The diffraction grating, designed to split a single beam into a specific number of equal-intensity diffraction orders, is placed inside the cavity formed by the laser array and a common-output mirror. The grating superimposes the light beams from the lasers in the array and produces a far-field pattern with the same divergence as that of a single laser. Six GaAIAs lasers from an antireflection-coated linear array were combined with a coupling efficiency of 68.4%. The far field of the combined GaAIAs lasers consisted of a single on-axis Gaussian beam.
- Research Organization:
- Massachusetts Inst. of Tech., Lexington (USA). Lincoln Lab.
- OSTI ID:
- 5386236
- Report Number(s):
- AD-A-188090/5/XAB; JA-5940
- Country of Publication:
- United States
- Language:
- English
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