Optical waveguides – Having particular optical characteristic modifying chemical... – Of waveguide core
Patent
1991-04-25
1992-06-02
Lee, John D.
Optical waveguides
Having particular optical characteristic modifying chemical...
Of waveguide core
385141, 372 6, G02B 616, H01S 330
Patent
active
051194600
ABSTRACT:
An active optical device comprises a glass, waveguiding structure disposed on a substantially planar principal surface of a substrate. The structure includes a silica-based, erbium-doped active core. The active core has an erbium-to-silicon atomic ratio of at least about 0.01, an absolute erbium concentration of at least about 1.4.times.10.sup.20 atoms per cubic centimeter, and a radiative lifetime of the erbium lasing level of at least about 7 milliseconds. Also disclosed is a method for forming an active optical device, including the step of depositing an erbium-doped active core by sputtering.
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Electronics Letters, vol. 27, No. 4, Feb. 14, 1991, "Guided-Wave Laser Based on Erbium-Doped Silica Planar Lightwave Circuit," by T. Kitagawa et al., pp. 334-335.
Bruce Allan J.
Shmulovich Joseph
Wong Amy
Wong Yiu-Huen
AT&T Bell Laboratories
Finston Martin I.
Heartney Phan T.
Lee John D.
Pacher Eugen E.
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