WO2001015289A3 - Method and system for maximizing safe laser power of structured laser light projectors - Google Patents

Method and system for maximizing safe laser power of structured laser light projectors Download PDF

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Publication number
WO2001015289A3
WO2001015289A3 PCT/US2000/021765 US0021765W WO0115289A3 WO 2001015289 A3 WO2001015289 A3 WO 2001015289A3 US 0021765 W US0021765 W US 0021765W WO 0115289 A3 WO0115289 A3 WO 0115289A3
Authority
WO
WIPO (PCT)
Prior art keywords
laser
laser diode
output
diode
light projectors
Prior art date
Application number
PCT/US2000/021765
Other languages
French (fr)
Other versions
WO2001015289A2 (en
Inventor
Joseph Camilleri
David L Kelly
Mark R Warren
Original Assignee
Perceptron Inc
Joseph Camilleri
David L Kelly
Mark R Warren
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Perceptron Inc, Joseph Camilleri, David L Kelly, Mark R Warren filed Critical Perceptron Inc
Priority to AU13266/01A priority Critical patent/AU1326601A/en
Publication of WO2001015289A2 publication Critical patent/WO2001015289A2/en
Publication of WO2001015289A3 publication Critical patent/WO2001015289A3/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/068—Stabilisation of laser output parameters
    • H01S5/06825—Protecting the laser, e.g. during switch-on/off, detection of malfunctioning or degradation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/068—Stabilisation of laser output parameters
    • H01S5/0683—Stabilisation of laser output parameters by monitoring the optical output parameters
    • H01S5/06835—Stabilising during pulse modulation or generation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
    • H01S5/042—Electrical excitation ; Circuits therefor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
    • H01S5/042—Electrical excitation ; Circuits therefor
    • H01S5/0428—Electrical excitation ; Circuits therefor for applying pulses to the laser
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/0617—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium using memorised or pre-programmed laser characteristics
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
    • H01S5/4025—Array arrangements, e.g. constituted by discrete laser diodes or laser bar
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
    • H01S5/42—Arrays of surface emitting lasers
    • H01S5/423—Arrays of surface emitting lasers having a vertical cavity

Abstract

A system and method for controlling the operating parameters of a laser diode (20) is provided. The laser control system (10) automatically optimizes the laser diode (20) operating characteristics while maintaining a safe peak power for pulse duration and pulse repetition frequency (PRF). The controlled level of output power is based on the laser diode gain determined during calibration of each laser diode projector as well as using the application of predetermined laser safety formulas. The laser control system (10) includes a laser diode (20) that is powered by a laser drive current. The laser diode (20) has a laser output having a peak power level. A detector (28) is coupled to the laser diode (20) for sensing the laser output. A laser driver (18) including a primary control loop (44) is operable, in response to the sensed laser output and a reference (43) to control the laser drive current such that the output power corresponds to the reference (43). A controller (52) is coupled to the laser driver (18).
PCT/US2000/021765 1999-08-09 2000-08-09 Method and system for maximizing safe laser power of structured laser light projectors WO2001015289A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU13266/01A AU1326601A (en) 1999-08-09 2000-08-09 Method and system for maximizing safe laser power of structured laser light projectors

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14791399P 1999-08-09 1999-08-09
US60/147,913 1999-08-09

Publications (2)

Publication Number Publication Date
WO2001015289A2 WO2001015289A2 (en) 2001-03-01
WO2001015289A3 true WO2001015289A3 (en) 2008-02-28

Family

ID=22523438

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/021765 WO2001015289A2 (en) 1999-08-09 2000-08-09 Method and system for maximizing safe laser power of structured laser light projectors

Country Status (3)

Country Link
US (1) US6661820B1 (en)
AU (1) AU1326601A (en)
WO (1) WO2001015289A2 (en)

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Also Published As

Publication number Publication date
AU1326601A (en) 2001-03-19
US6661820B1 (en) 2003-12-09
WO2001015289A2 (en) 2001-03-01

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