公开(公告)号：US20220337017A1

公开(公告)日：2022-10-20

申请号：US17763407

申请日：2019-09-26

Applicant: UAB ,,EKSPLA"

Inventor： Andrejus MICHAILOVAS ,  Tadas BARTULEVICIUS

IPC: H01S3/067 ,  H01S3/00 ,  H01S3/23

Abstract: A method for generating gigahertz bursts of laser pulses is provided, where: 1) time delay T2 of the delayed part with respect to the undelayed part of the input pulse is longer than a time period T1 between said input pulse and the next input pulse; 2) the bursts of output pulses have an incrementally increasing number of pulses; 3) intra-burst pulse separation inside the formed bursts is equal to T3=T2−T1 and corresponds to an ultra-high pulse repetition rate higher than 100 MHz. In another embodiment: 1) T2 is longer than M*T1, where M=2, 3, etc.; 2) output train of bursts is composed of bursts of pulses wherein M adjacent bursts have identical number of pulses; 3) T3 is equal to T3=T2−M*T1. The laser apparatus for implementing the method is provided.

公开(公告)号：US20240027873A1

公开(公告)日：2024-01-25

申请号：US18255737

申请日：2021-11-15

Applicant: UAB"EKSPLA"

Inventor： Romaldas ANTANAVICIUS ,  Mikhail GRISHIN ,  Andrejus MICHAILOVAS

IPC: G02F1/39 ,  G01J3/10 ,  H01S3/23 ,  H01S3/094 ,  G02F1/35 ,  H01S3/16 ,  H01S3/1106

CPC classification number: G02F1/392 ,  G01J3/108 ,  H01S3/235 ,  H01S3/094076 ,  G02F1/3526 ,  G02F1/3503 ,  H01S3/1611 ,  H01S3/1106 ,  G02F1/3507 ,  H01S3/1673 ,  H01S3/1643 ,  G02F1/3551

Abstract: Wavelength-tunable source of pulsed laser radiation for VIS-NIR spectroscopy which consists of a pump source (1) forming bursts of picosecond pulses of high pulse repetition rate, and a synchronously pumped optical parametric oscillator (2). The pump source (1) comprises a solid-state regenerative amplifier (31) having one or two electro-optical switches (32,33) inside its resonator (44). The switches create partial transmission of the resonator for a time interval longer than a resonator roundtrip time, and eject a part of energy of a pulse circulating inside. Bursts of 5-10 ns duration are formed, which are filled with high peak power picosecond pulses. Pulse repetition rate of the order of GHz of pump pulses allows the construction of a compact optical parametric oscillator. The whole set of parameters ensures high energy efficiency, stability and an ability to provide output pulse bursts repeating at up to 10 kHz repetition rate.