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1. (WO2019067034) CONTROLLING OUTPUT POWER OF A LASER AMPLIFIER WITH VARIABLE PULSE RATE
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Pub. No.: WO/2019/067034 International Application No.: PCT/US2018/037970
Publication Date: 04.04.2019 International Filing Date: 18.06.2018
IPC:
H01S 3/067 (2006.01) ,H01S 3/10 (2006.01) ,H01S 3/13 (2006.01) ,H01S 3/23 (2006.01) ,H01S 5/062 (2006.01)
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
S
DEVICES USING STIMULATED EMISSION
3
Lasers, i.e. devices for generation, amplification, modulation, demodulation, or frequency-changing, using stimulated emission, of infra-red, visible, or ultra-violet waves
05
Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
06
Construction or shape of active medium
063
Waveguide lasers, e.g. laser amplifiers
067
Fibre lasers
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
S
DEVICES USING STIMULATED EMISSION
3
Lasers, i.e. devices for generation, amplification, modulation, demodulation, or frequency-changing, using stimulated emission, of infra-red, visible, or ultra-violet waves
10
Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
S
DEVICES USING STIMULATED EMISSION
3
Lasers, i.e. devices for generation, amplification, modulation, demodulation, or frequency-changing, using stimulated emission, of infra-red, visible, or ultra-violet waves
10
Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
13
Stabilisation of laser output parameters, e.g. frequency, amplitude
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
S
DEVICES USING STIMULATED EMISSION
3
Lasers, i.e. devices for generation, amplification, modulation, demodulation, or frequency-changing, using stimulated emission, of infra-red, visible, or ultra-violet waves
23
Arrangement of two or more lasers not provided for in groups H01S3/02-H01S3/14113
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
S
DEVICES USING STIMULATED EMISSION
5
Semiconductor lasers
06
Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
062
by varying the potential of the electrodes
Applicants:
APPLE INC. [US/US]; One Apple Park Way Cupertino, California 95014, US
Inventors:
LUFT, Ido; US
SUTTON, Andrew J.; US
AKERMAN, Ronen; US
Agent:
KLIGLER, Daniel; IL
Priority Data:
15/849,70021.12.2017US
62/563,69627.09.2017US
Title (EN) CONTROLLING OUTPUT POWER OF A LASER AMPLIFIER WITH VARIABLE PULSE RATE
(FR) COMMANDE DE LA PUISSANCE DE SORTIE D'UN AMPLIFICATEUR LASER À TAUX D'IMPULSIONS VARIABLE
Abstract:
(EN) A laser system (20) includes a master oscillator (22), which emits a train of optical seed pulses with variable intervals between the pulses. An optical power amplifier (26) includes an optical gain medium (38), which receives and amplifies the optical seed pulses from the master oscillator, and a pump (42), which applies pump radiation to the optical gain medium. A pulse generator (32) applies a control input to the master oscillator, which causes the intervals between the optical seed pulses to vary by at least 50% at a rate of change that is greater than a response frequency of the optical gain medium. A control unit (34) drives the pump responsively to predicted intervals between the optical seed pulses, at a variable pump power selected so that the pulse amplitudes of the output pulses vary by no more than 20% irrespective of the varying intervals between the optical seed pulses.
(FR) Un système laser (20) comprend un oscillateur maître (22), qui émet un train d'impulsions de germe optique avec des intervalles variables entre les impulsions. Un amplificateur de puissance optique (26) comprend un milieu de gain optique (38), qui reçoit et amplifie les impulsions de germe optique provenant de l'oscillateur maître, et une pompe (42), qui applique un rayonnement de pompe au milieu de gain optique. Un générateur d'impulsions (32) applique une entrée de commande à l'oscillateur maître, ce qui amène les intervalles entre les impulsions de germe optique à varier d'au moins 50 % à un taux de changement qui est supérieur à une fréquence de réponse du milieu de gain optique. Une unité de commande (34) commande la pompe en réponse à des intervalles prédits entre les impulsions de germe optique, à une puissance de pompe variable sélectionnée de telle sorte que les amplitudes d'impulsion des impulsions de sortie varient d'au plus 20 % indépendamment des intervalles variables entre les impulsions de germe optique.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)