Wavelength stabilized, tunable optical transmitter with high SMS

Details Wavelength stabilized, tunable optical transmitter with high SMS Wavelength stabilized, tunable optical transmitter with high SMS

1999-06-11

2000-05-16

Scott, Jr., Leon

Coherent light generators

Particular beam control device

Optical output stabilization

372 20, 372 29, 372 38, 372 96, H01S 313

Patent

active

060646810

ABSTRACT:
In practical WDM systems, the maximum SMSR for each channel does not necessarily occur where dP.sub.out /dI.sub.tune =0. In fact, for most channels the maximum SMSR occurs at values of tuning current where this first derivative in not zero. In accordance with one aspect of the invention, a wavelength stabilized optical transmitter includes a DBR laser and a feedback loop for controlling the center wavelength of the laser, characterized in that the transmitter also includes a memory in which are stored the non-zero values of dP.sub.out /dI.sub.tune where the SMSR is a maximum for each of a multiplicity of different channel wavelengths and further includes a controller responsive to the stored values for delivering to the laser a level of tuning current that maximizes the SMSR for a particular channel wavelength.

REFERENCES:
patent: 5220578 (1993-06-01), Koch et al.
S. L. Woodward et al., A Control Loop . . . , IEEE Photonics Tech. Lett., vol. 4, No. 5, pp. 417-419 (May 1992).

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