Wavelength selectable laser with inherent and sing

专利名称：Wavelength selectable laser with inherent

and single-mode stability

发明人：Christopher R. Doerr,Charles H. Joyner申请号：US08/861495申请日：19970522公开号：US05881079A公开日：19990309

摘要：A single-mode stabilized laser comprises a laser cavity having a round trip time&tgr;.sub.r and a linewidth enhancement parameter &agr; ; and a frequency routingdevice formed in the laser cavity comprising controllable frequency selective pathwayssuch that selective gating of the frequency selective pathways causes selected lasingfrequencies to be supported in the laser cavity separated by a frequency spacing &Dgr; F.sub.C, &Dgr;F.sub.C =1/&tgr;.sub.r. The frequency routing device has an optical gratinghaving unequal length waveguides to form paths. The optical grating has arms, a timedelay &tgr;.sub.f between the longest path and the shortest path, and a gratingbandwidth &Dgr;F.sub.F, . DELTA. F.sub.F =1/&tgr;.sub.f, at least one of (1) &agr; and (2)&tgr;. sub.r and &tgr;.sub.f having sufficient value to stabilize the laser in single- modeoperation. A method of turning on a laser having a waveguide grating to a stableoperating condition comprises the steps of applying an initial current to a first amplifierand maintaining a second amplifier off; allowing the laser to reach thermal equilibrium;applying an operating current to the second amplifier; and applying another operatingcurrent to the first amplifier to stably operate the laser.

申请人：LUCENT TECHNOLOGIES INC.

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