Diamond laser crystal and method manufacturing the same

Details Diamond laser crystal and method manufacturing the same Diamond laser crystal and method manufacturing the same

1989-06-08

1990-08-21

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Synthetic precious stones

372103, 372 42, 372 11, 156DIG80, 423446, C04B 3552

Patent

active

049506250

ABSTRACT:
A method of manufacturing a diamond laser crystal having an excellent laser efficiency is performed by first, preparing a synthetic type Ib diamond containing at least 60 volume percent of a (111) plane growth sector (43) is prepared. This synthetic diamond is then thermally treated under high temperature/high pressure, so that type Ib nitrogen contained in the synthetic diamond is converted to type IaA nitrogen. Thereafter an electron beam is applied to the synthetic diamond in order to generate vacancies in the synthetic diamond. Finally annealing is performed on the synthetic diamond to form H3 centers by coupling the type IaA nitrogen atoms contained in the synthetic diamond, with the vacancies. According to this method, the H3 centers can be formed in the synthetic type Ib diamond at high concentration, while formation of NV centers which become an obstacle to laser action, can be suppressed.

REFERENCES:
patent: 4174380 (1979-11-01), Strong et al.
patent: 4399364 (1983-08-01), Evans et al.
H. P. Bovenkerk, Some Observations on the Morphology and Physical Characteristics of Synthetic Diamond, The American Mineralogist, vol. 46, (1961).
A. T. Collins, Thomaz, and Jorge, Luminescence Decay Time of the 1.945 eV Center in Type Ib Diamond, J. Phys. C.: Solid State Phys., 16, (1983).
Article entitled: "Visible Color-Center Laser in Diamond" by S. C. Rand and L. G. DeShazer; Reprinted from Optics Letters, vol. 10, No. 10, Oct. 1985, pp. 481, 482, 483.
Article entitled: "High Temperature Annealing of Colour Centres in Type I Diamond", by A. T. Collins, Diamond Research '79, Wheatstone Physics Laboratory, Kings's College, London, pp. 7-12.
Article entitled: "Transformation of the State of Nitrogen in Diamond" by R. M. Chrenko et al., Nature, vol. 270, Nov. 10, 1977, pp. 141-144.
Journal of Physics C Solid St. Phys., 13, (1980), pp. 2641-2650, A. T. Collins.
"Proceeding of the Royal Society of London", A381, 1982, pp. 159-178, by T. Evans et al.
Journal of Physics D. Applied Physics, 15, (1982), pp. 1431-1438, by A. T. Collins.
Article in "Tunable Solid State Laser" by S. C. Rand, pp. 276-280, published by Springer Verlag.

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