US 7,321,606 B2 | ||
Laser trim and compensation methodology for passively aligning optical transmitter | ||
Hsin-Ho Wu, Santa Clara, Calif. (US); and Peter Deane, Moss Beach, Calif. (US) | ||
Assigned to National Semiconductor Corporation, Santa Clara, Calif. (US) | ||
Filed on Dec. 09, 2003, as Appl. No. 10/731,965. | ||
Application 10/731965 is a continuation in part of application No. 10/683212, filed on Oct. 09, 2003. | ||
Prior Publication US 2005/0078722 A1, Apr. 14, 2005 | ||
Int. Cl. H01S 3/00 (2006.01) |
U.S. Cl. 372—38.1 [372/38.01; 372/38.02; 372/29.021; 372/29.011; 372/33] | 16 Claims |
1. A method of establishing a trim and compensation scheme for a laser emitter in a fiber optic link where the laser emitter
is selected from among a group of similar lasers, the method comprising:
a) providing data models that characterize laser performance for a group of lasers, the models being generated using laser
performance data obtained from measurements of laser properties taken from a sample group of lasers taken from the group of
lasers;
b) determining a base power level using information from the data models and a predetermined set of user specified performance
parameters;
c) determining whether the base power level satisfies a set of pre-specified operating parameters;
if a laser having the determined base power level does not satisfy the set of pre-specified operating parameters, the user
specified performance parameters are adjusted and the operations of b) and c) are repeated to determine a new base power level;
if a laser having the determined base power level does satisfy the set of pre-specified operating parameters, then process
moves on to the next operation d); and
d) determining a relationship between temperature and associated current values that can be used to regulate laser performance
over a range of temperature.
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