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
OG exemplary drawing
 
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.