RU2066509C1 - Laser with complex core - Google Patents

Abstract

FIELD: quantum electronics. SUBSTANCE: laser has open cavity 1, excitation source 2, solid core which is designed as rectangular parallel-plate chip 3, which is made from stimulating material which is optically connected to films 4, which depth is λ/4 where l is wave length of laser. Films are connected to prisms 5. Refraction index of chip equals to those of prisms, while refraction index of film is lesser than those of chip and prisms. Excitation source is located at angle that provides following condition sinΦ≥n₁/n, where Φ is inclination angle of flat monochrome wave (excitation light), n₁ is refraction index of films, n is refraction index of prisms. EFFECT: increased functional capabilities. 1 dwg

Description

 The invention relates to quantum electronics, in particular to designs of active elements of lasers.

A solid-state laser is known, the active element of which is made in the form of a composite rod comprising an active medium surrounded by a dielectric sheath, which concentrates the pump rays on the active laser medium [1]
However, in the known device, the cylindrical shape of the shell and the active element does not allow to achieve a high concentration of pump rays on the active substance, which affects the efficient use of pump radiation.

 The closest in technical essence and the achieved result is a laser [2] whose active element is made in the form of a plane-parallel plate, at least one of two opposite planes of which is connected to the shell, which is a circle segment in cross section.

 The disadvantage of this laser is that the active element accumulates little energy, since a significant part of the light energy leaves the active element during the pumping process.

где Φ угол падения плоской монохроматической волны излучения накачки;
n₁ показатель преломления пленок, n показатель преломления призм;
l длина волны излучения генерируемого лазером с составным активным элементом.In the known device containing an open optical resonator, a pump source, an active element in the form of a rectangular plane-parallel plate, the opposite planes of which are optically connected to elements made of a transparent material with the same refractive index as the plate, the elements are made in the form of rectangular prisms, between the prisms and the plate there are films of thickness λ / 4 made of an optically transparent material, the refractive index of which is less than the refractive indices of the plate and prisms, and having optical contact with the prisms and the plate, and the pump source is located so that the condition

where Φ is the angle of incidence of a plane monochromatic pump radiation wave;
n _{1 is} the refractive index of the films, n is the refractive index of the prisms;
l wavelength of radiation generated by a laser with a composite active element.

где Φ угол падения плоской монохроматической волны излучения накачки;
n₁ показатель преломления пленок, n показатель преломления призм;
l длина волны излучения генерируемого лазером с составным активным элементом, позволяет повысить эффективность использования излучения накачки.The use of a solid-state active element in the form of a rectangular plane-parallel plate, the opposite planes of which are connected to rectangular transparent prisms, between the prisms and the plate are films of thickness l / 4 made of optically transparent material, the refractive index of which is less than the refractive indices of the plate and prisms, and having optical contact with prisms and a plate, and the pump source is located in such a way that the condition:

where Φ is the angle of incidence of a plane monochromatic pump radiation wave;
n _{1 is} the refractive index of the films, n is the refractive index of the prisms;
l The wavelength of radiation generated by a laser with a composite active element, allows to increase the efficiency of the use of pump radiation.

 The authors are not aware of lasers having features similar to the distinguishing features of the proposed device, which allows us to conclude that the criterion of "significant differences".

 The drawing shows a laser with a composite active element.

 The laser consists of an open optical resonator 1, a pump source 2, a solid-state active element, consisting of a rectangular plane-parallel plate made of a stimulating material 3, optically connected to the films 4 and transparent prisms 5.

 The laser operates as follows: the optical radiation of the pump 2 penetrates into the prism 5, optically tunnels through the film 4 into the plate 3. Thus, the laser is pumped.

 The proposed laser compares favorably with the specified prototype, as it allows more efficient use of optical pump radiation.

Claims (1)

A laser with a composite active element containing an open optical resonator, a pump source, a solid-state active element of a stimulating material in the form of a plane-parallel plate, the opposite planes of which are optically connected with elements made of a transparent material with the same refractive index as the plate, characterized in that the elements are made in the form of rectangular prisms, between the prisms and the plate there are films of thickness λ / 4 made of an optically transparent material, an indicator whose refraction is less than the refractive indices of the plate and prisms, and having optical contact with the prisms and the plate, and the pump source is located in such a way that the condition

where Φ is the angle of incidence of a plane monochromatic pump radiation wave;
n _{1 is} the refractive index of the films;
n the refractive index of prisms;
l 4 wavelength of radiation generated by a laser with a composite active element.