High-precision repetition rate locking apparatus for ultra-fast laser pulse

Patent metadata

Field	Value
Publication number	US-12438335-B2
Application number	US-202217936663-A
Country	US
Kind code	B2
Filing date	Sep 29, 2022
Priority date	Sep 30, 2021
Publication date	Oct 7, 2025
Grant date	Oct 7, 2025

Abstract

A high-precision repetition rate locking apparatus for an ultra-fast laser pulse includes: an electronic controlling component comprising: a standard clock, configured to provide a high-precision frequency standard; a pulse generator (PG), configured to provide an electrical pulse signal with adjustable repetition rate, pulse width and voltage magnitude; and a signal generator (SG), connected to the standard clock and the PG, and configured to provide a stable frequency signal for the PG, a phase-shift adjusting component, connected to the electronic controlling component and configured to implement phase modulation through electrically induced refractive index change; a resonant cavity component, comprising a phase shifter, a doped fiber, a laser diode, a wavelength division multiplexer and a reflector, and configured to generate a mode-locked pulse; and a detection system, configured to measure a repetition rate of an output pulse.

First claim

What is claimed is:

1. A high-precision repetition rate locking apparatus for an ultra-fast laser pulse, comprises:
an electronic controlling component, configured to provide a high-precision radio-frequency electrical pulse signal, and comprising:
a standard clock, configured to provide a high-precision frequency standard;
a pulse generator (PG), configured to provide an electrical pulse signal with adjustable repetition rate, pulse width and voltage magnitude;
a signal generator (SG), connected to the standard clock and the PG, and configured to provide a stable frequency signal for the PG;
a loop mirror, connected to the electronic controlling component;
a phase-shift adjusting component, disposed in the loop mirror and connected to the electronic controlling component, and configured to implement phase modulation through electrically induced refractive index change of a crystal in the phase-shift adjusting component;
a resonant cavity component, comprising a phase shifter, a doped fiber, a laser diode, a wavelength division multiplexer and a reflector, and configured to generate a mode-locked pulse; and
a detecting component, configured to measure a repetition rate of an output pulse;
wherein the detecting component comprises a photoelectric detector and a frequency counter.

2. The high-precision repetition rate locking apparatus according to claim 1 , wherein the phase-shift adjusting component is a phase modulator.

3. The high-precision repetition rate locking apparatus according to claim 2 , wherein the phase modulator is an electro-optic modulator based on a lithium niobate crystal.

4. The high-precision repetition rate locking apparatus according to claim 1 , wherein the PG is a nanosecond PG for providing an ultrashort pulse.

5. The high-precision repetition rate locking apparatus according to claim 1 , wherein the standard clock is a hydrogen clock or a rubidium clock.

6. The high-precision repetition rate locking apparatus according to claim 1 , wherein the electrical pulse signal generated by the PG has a pulse width from 1 to 15 ns and an adjustable amplitude range from 0 to 3 V.

7. The high-precision repetition rate locking apparatus according to claim 1 , wherein the doped fiber is an erbium-doped fiber or an ytterbium-doped fiber.

8. The high-precision repetition rate locking apparatus according to claim 1 , wherein the reflector is a fiber Bragg grating or an optic fiber mirror.

Assignees

• Chongqing Institute Of East China Normal Univ
• Univ East China Normal
• Yunnan Huapu Quantum Mat Co Ltd
• Roi Optoelectronics Tech Co Ltd
• Chongqing Huapu Scient Instrument Co Ltd
• Chongqing Huapu Intelligent Equipment Co Ltd
• Guangdong Roi Optoelectronics Tech Co Ltd

Inventors

• Zeng Heping
• Huang Kun
• Yu Tingting
• Hu Mengyun

Classifications

• H01S3/1109 Primary

  Active mode locking · CPC title

• H01S3/13 Primary

  Stabilisation of laser output parameters, e.g. frequency or amplitude · CPC title

• H01S3/0912

  Electronics or drivers for the pump source, i.e. details of drivers or circuitry specific for laser pumping (laser diode drivers H01S5/042) · CPC title

• H01S3/0675

  Resonators including a grating structure, e.g. distributed Bragg reflectors [DBR] or distributed feedback [DFB] fibre lasers · CPC title

• H01S3/09415

  the pumping beam being parallel to the lasing mode of the pumped medium, e.g. end-pumping · CPC title