RU2358365C1 - Portable multicoloured pulse-periodic fibre laser emitter with pyrotechnic pumping - Google Patents

Abstract

FIELD: physics; optics.

SUBSTANCE: present invention pertains to pulse-periodic fibre laser emitters with pyrotechnic pumping and can be used for testing resistance of optronic equipment to laser radiation. The device contains an emitter unit, pyrotechnic lamps and a holder for holding the pyrotechnic lamps. The device also contains fibre-active elements, made from glass, which, for each separate fibre-active element, is activated by ions of a chemical element, different from ions which are used to activate other fibre-active elements, a shutter system and a total-reflection prism system. The emitter unit is made in form of a system of pipes, consisting of a cylindrical mirror reflector and a quartz pipe, between which there are spiral-shaped fibre-active elements.

EFFECT: obtaining a reusable, portable, reliably stored and easy to use emitter, providing for intense narrow-directed pulse-periodic laser radiation at the output with wavelength 1,03 mcm, 1,06 mcm and 2,9 mcm with different combinations of wavelength in a single pulse.

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Description

The invention can be used to study the resistance of optical-electronic means to laser radiation.

A number of devices are known [1, 2], designed to study the resistance of optoelectronic devices to laser radiation, based on pumping the active element using pyrotechnic lamps. However, these devices have a number of significant disadvantages.

The device [1] uses a laser design pumped by a coaxial pyrotechnic cartridge of an optical fiber active element. The device itself is comparable in size to a fountain pen and has several disadvantages:

the emitter works only at one wavelength, which imposes restrictions on its use in a number of applied and research tasks;

the emitter is monopulse and requires a fairly long recharge time.

The closest in technical essence to the proposed source is a portable multi-color pulse-periodic laser source with pyrotechnic pumping [2], containing several pyrotechnic lamps and three different active elements, which are rods with plane-parallel ends made of glass activated by Nd ³⁺ neodymium ions , glass activated with erbium ions Er ³⁺ , and garnet activated with chromium ions Cr ³⁺ . The source consists of a pumping unit and an optical unit made in the form of rotating cylindrical drums with horizontal grooves covered with reflective material.

The disadvantages of this technical solution are:

the need to process the ends of the rods of the active elements with special reflective materials that are destroyed by the action of pulsed radiation;

in one pulse it is possible to obtain only one wave of radiation;

the presence of rotating parts that reduce the reliability of the device.

The objective of the invention is to obtain a reusable, portable, reliable in storage and easy to use emitter, providing the output of an intense narrowly targeted pulsed periodic laser radiation with a wavelength of 1.03 μm, 1.06 μm and 2.9 μm, with a different combination of lengths waves in one pulse.

To solve this problem, a pyrotechnically pumped optical radiation source has been proposed that contains several pyrotechnic pump lamps [3, 4] (the number of lamps depends on the volume of the cage) and three different active elements, which are fiber-active elements made of glass activated by ytterbium ions Yb ³⁺ , neodymium Nd ³⁺ and erbium Er ³⁺ for the transformation of broadband optical radiation into laser radiation with a wavelength of 1.03 μm, 1.06 μm and 2.9 μm, respectively.

Distinctive features of the claimed invention are that:

a) fiber-active elements of various types are used, which, combined with the operation of the shutter system and the system of total reflection prisms, allows one to receive laser radiation with different wavelengths and with different combinations of wavelengths per pulse.

b) the emitter block is made in the form of a tube system consisting of a cylindrical mirror reflector and a quartz tube, between which there are spiral-active fiber-active elements;

c) the design of the housing allows you to throw out spent pyrotechnic lamps due to the supply of new ones.

The presence of these signs determines the compliance of the proposed technical solution to the criterion of "novelty."

As a result of the patent search, prior to the filing date of the application, no technical solutions have been identified that have characteristics that are identical to the whole set of essential features contained in the proposed application, which indicates the inventive step of the proposed technical solution.

The drawing shows a diagram of the proposed device.

In the housing 1 there are pyrotechnic pump lamps 2, an emitter unit 3, a full reflection prism system 4, a shutter system 5, an exhaust lamp ejection hole 6, an optical output lens 7, a clip 8, a shutter system operation control unit 9 and a mode switch 10. Block the emitter 3 includes fiber-active elements 11, a quartz tube 12 and a reflector 13.

The device includes three types of fiber-active elements:

1. fiber from glass activated by ytterbium ions Yb ³⁺ ;

2. fiber made of glass doped with neodymium ions Nd ³⁺ ;

3. fiber made of glass activated with Er ³⁺ erbium ions.

For a more complete use of the radiation of the pyrotechnic pump lamp, the fiber-active elements are placed inside the mirror reflector. Fiber-active elements are evenly wound on a special quartz tube to filter harmful ultraviolet radiation. At the same time, the tube acts as a guide for the supply and discharge of used pyrotechnic lamps.

A feature of the operation of the device is that a new pyrotechnic pump lamp 2 is fed into the quartz tube 12, expelling the spent through the hole 6 in the housing 1. In the reflector 13, a new pyrotechnic lamp is ignited. Its radiation is converted in all fiber-active elements 11 into a laser. Due to the operation of the shutter system 5, the necessary combination of wavelengths in the pulse is formed, which is fed through the system of total reflection prisms 4 to the output optical lens 7, where it is formed into a directed beam. The operation of the shutter system 5 is controlled by the control unit 9 by changing the position of the mode switch 10. A clip 8 is used as a device for supplying new pyrotechnic lamps.

Literature

1. Patent RU 2217850 C2, 7 H01S 3/091, 08.24.2001.

2. Patent RU 2293412 C1, 7 H01S 3/02, 06/27/2005.

3. Patent for invention No. 2239264 dated 10.27.2004.

4. Patent for invention No. 2227244 dated 04/20/2004.

Claims (1)

A portable multi-color pulsed-periodic fiber laser emitter with pyrotechnic pumping, comprising an emitter unit, pyrotechnic lamps and a clip for storing pyrotechnic lamps, characterized in that fiber-active elements made of glass are additionally introduced into it, which is made of glass for each individual fiber-active element activated by ions of a chemical element other than ions by which other fiber-active elements are activated, the gate system and the prism system of total reflection Ia, a radiator block is made in the form of a pipe system consisting of a cylindrical mirror reflector and a quartz tube, between which are the active elements of fiber spiral.