Incremental printing of symbolic information – Light or beam marking apparatus or processes – Scan of light
Patent
1998-05-26
2000-12-12
Le, N.
Incremental printing of symbolic information
Light or beam marking apparatus or processes
Scan of light
347246, 347238, 385126, 372 70, 372 75, B41J 2435
Patent
active
061605689
ABSTRACT:
A laser marking system comprises a high power fiber laser consisting of a double clad fiber having a doped core surrounded by an inner pump cladding and providing an optical output for marking; a high power laser diode source for pumping the double clad fiber laser via an input into the inner pump cladding; an optical scanner coupled to receive the marking output from the double clad fiber laser to scan the output over a surface of an article to be marked by sweeping the marking output in one, two or three dimensions to form strokes, the completion of which comprises indicia to be marked the article surface; and a controller to control the operation of the scanner in synchronism with the modulation of the laser diode pump source to initiate the marking output and sweep and modulate the marking optical output in one, two or three dimensions to form strokes comprising the indicia. A main advantage of the fiber laser marking system over CO.sub.2 and YAG laser marking systems is the ability to provide modulation via the semiconductor laser diode at the input to the marking laser rather than having to modulate the optical power beam at the output of the marking laser, such as through an acusto-optic modulator, which provides for a pulse of non-uniform stability across the pulse width with a substantially decrease in the amount of power in the modulated beam output. Also disclosed is circuitry to dampen the ON-time rise of a current signal input for operation of the laser diode pump source to improve the ON-time quality of the marking optical output created by the double clad fiber marking laser.
REFERENCES:
patent: 4522656 (1985-06-01), Kuhn-Kuhnenfeld et al.
patent: 4652722 (1987-03-01), Stone et al.
patent: 4727235 (1988-02-01), Stamer et al.
patent: 4963714 (1990-10-01), Adamski et al.
patent: 5225923 (1993-07-01), Montagu
patent: 5263036 (1993-11-01), DeBernardi et al.
patent: 5268978 (1993-12-01), Po et al.
patent: 5329090 (1994-07-01), Woelki et al.
patent: 5374973 (1994-12-01), Maxham et al.
patent: 5418880 (1995-05-01), Lewis et al.
patent: 5694408 (1997-12-01), Bott et al.
patent: 5719372 (1998-02-01), Togari et al.
patent: 5734412 (1998-03-01), Hasebe et al.
patent: 5799029 (1998-08-01), Rossi et al.
patent: 5867305 (1999-02-01), Waarts et al.
patent: 5887009 (1999-03-01), Mandella et al.
Mark Wegmuller et al., entitled "Diode-Pumped Passively Mode-Locked Nd.sup.3+ -Doped Fluoride Fiber Laser Emitting at 1.05 micron: Novel Results" IEEE Journal of Quantum Electronics, vol. 34, No. 1, Jan., 1998.
Brodsky Mark A.
Welch David F.
Yim Yong
Carothers, Jr. W. Douglas
Le N.
Pham Hai C.
SDL Inc.
LandOfFree
Laser marking system and method of energy control does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Laser marking system and method of energy control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laser marking system and method of energy control will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-222501