RU2309545C1 - Optic-electronic transmitter - Google Patents

Abstract

FIELD: optical electronics, possible use in systems where crystalline laser is used.

SUBSTANCE: optic-electronic transmitter contains laser, electro-optical deflection device, two correcting lenses, turned mirrors and optic-electronic transformer, optical output of the laser is connected via electro-optical deflecting device, turned mirrors, optic-electronic transformer and second correcting lens to optical input of the laser. Additionally the device contains third correcting lens, turned semi-transparent mirror, photo-element, light diode and voltage supply, where between optical output of optical-electronic transformer and second correcting lens, first correcting lens and turned semi-transparent mirror are positioned in optical serial connection, optical output of optic-electronic transformer being also connected through first correcting lens and turned semi-transparent mirror to optical input of photo-element, output of which is connected to input of light diode, connected to output of voltage supply, optical output of light diode is connected through third correcting lens and turned semi-transparent mirror to the second correcting lens.

EFFECT: increased power of radiation, reduced bulkiness.

1 dwg

Description

The invention relates to the field of optoelectronics and can be used in optical systems.

Known optoelectronic transmitter, which uses an optoelectronic converter. It is set out in the book of I.K. Vereshchagin "Introduction to Optoelectronics". High School, 1991, p. 62. Radiation can be uniform. Light energy from the laser can be supplied to the input of the converter, and the spectrum changes at the output. However, the device is not able to increase the radiation power without introducing additional nodes.

Known optoelectronic transmitter described in the patent of the author No. 2270498, bull. No. 5 of 02.20.2006. The principle of its work is as follows. The light flux from the laser output, reflected from the rotated reflective mirrors, passes through a correction lens into an optoelectronic converter, which amplifies the light and changes its spectrum, which then passes through a second correction lens to the laser optical input. Moreover, a necessary condition is a significant excess of the frequency supplied to the laser input over the frequency emitted by it.

The output of light energy is carried out using an electro-optical modulator, which is an electro-optical deflecting device.

Using the proposed device increases the radiation power without the introduction of bulky nodes. This is achieved by introducing between the optical output of the optoelectronic converter and the second corrective lens a series of optically coupled first corrective lenses and a rotated translucent reflective mirror instead of the third rotated reflective mirror, as well as the introduction of a photocell, LED, voltage source and a third corrective lens, while the optical output of the optoelectronic converter through the aforementioned first corrective lens and rotated translucent reflective e mirror is also connected to the optical input detector, whose output is connected to the LED input connected to the output of the voltage source, and having an optical output coupled through a third correction lens, rotated through said semitransparent reflecting mirror with the second correcting lens.

In the drawing and in the text, the following notation:

1 - rotated reflective mirror;

2 - electro-optical deflecting device;

3 - laser;

4 - corrective lens;

5 - rotated reflective mirror;

6 - optoelectronic converter;

7 - corrective lens;

8 - rotated translucent reflective mirror;

9 - photocell;

10 - corrective lens;

11 - LED;

12 - voltage source

wherein the optical output of the laser 3 through the electro-optical deflecting device 2, through the turned reflective mirrors 1 and 5, through the optoelectronic converter 6, through the correction lens 7, through the turned translucent reflective mirror 8, through the correction lens 4 is connected to the optical input of the laser 1 and also with the optical input of the photocell 9, the output of which is connected to the output of the voltage source 12, also connected to the input of the LED 11 having an optical output connected through a correction lens 10 through the above saponified translucent mirror 8 with the said corrective lens 4.

The operation of the device is as follows. The laser 3 generates a light flux that passes through the electro-optical deflecting device 2 and then, reflected from the rotated reflective mirrors 1, 5, enters the optoelectronic converter 6, which amplifies the signal. At the same time, another spectrum is formed at the output, which comes through the corrective lens 7, and, reflected from the rotated reflective translucent mirror 8 and passes further through the corrective lens 4, enters the optical input of the laser 3. The corrective lens 7 maintains the parallelism of the rays inside the beam, and the corrective lens lens 4 performs the formation of beam divergence for pumping.

In this device, there is no image of the pictures and the radiation of the optoelectronic converter 6 is uniform. Thanks to the mirrors 1, 5, a positive feedback of the optical output of the laser 3 with its input is carried out. An increase in light intensity is also achieved by using a photocell 9, a corrective lens 10, an LED 11 fed from a power source 12. In this case, the beam from the optical output of the optoelectronic converter 6 through the aforementioned correction lens 7 and a rotated translucent reflective mirror 8 is fed to the optical input of the photocell 9, converting light energy into electrical and spectral sensitivity which corresponds to the spectrum emitted by the optoelectronic converter 6. Photocell output 9 is connected to the input of the LED 11 and the output of the voltage source 12. In the LED 11, electric energy is converted into light energy, which, through the corrective lens 10, ensuring the parallelism of the rays inside the beam, enters through the rotated translucent reflective mirror 8, through the aforementioned corrective lens 4 on the optical input of the laser 3 and is also fed to the aforementioned optical input of the photocell 9. As a result of the feedback, an avalanche-like increase in the illumination of the photoelectric element 9, and consequently, an increase in the current and voltage at the input of the LED 11, the emission spectrum of which corresponds to the emission spectrum of the optoelectronic converter 6. The distance of the rotated translucent reflective mirror 8 from the correction lenses 7 and 10 ensures that the circuit is tuned to the frequency resonance that maximizes light generation at the output of the laser 3, due to an increase in the intensity of light at this frequency supplied to its input. Thus, the radiation power of the laser 3 is increased due to an increase in the conversion coefficient of the pump power to the output power. Therefore, the effect of the lack of monochromaticity of the light at the input of the laser 3 on the decrease in the radiation power is reduced. In addition, it becomes possible to work in the absence of a pump lamp inside the laser, since LED 11 can be used as a lamp after the appearance of light energy on it sufficient to start laser generation, and a further increase in radiation power will occur by the above method. This reduces the bulkiness of the device. An example of a specific laser design, which can increase the radiation power when pumping with light with an increased spectrum frequency compared to the emitted spectrum, is presented, for example, in the book of L.Z. Kriksunov, "Reference to the basics of infrared technology." M., Sov. Radio, 1978, p. 308. An example of a specific implementation of an electro-optical deflecting device is presented, for example, in the book of Yu. M. Klimkov, "Fundamentals of the calculation of optoelectronic devices with lasers" M., Sov. Radio, 1978, p. 87, Fig. 3.5, and the device for a specific application of the photocell is presented, for example, in the book by A. M. Vasilevsky et al. "Optical Electronics". Energoatomizdat, 1990, p. 26, 27 and in the aforementioned Handbook of L.Z. Kriksunov on p. 248-250.

The device can most effectively be used in systems where a crystal laser is used. In this case, the radiation power increases with a decrease in bulkiness.

Claims (1)

An optoelectronic transmitter comprising a laser, an electro-optical deflecting device, two correction lenses, rotated mirrors and an optoelectronic converter, an optical laser output is connected through an electro-optical deflecting device, rotated mirrors, an optoelectronic converter and a second correction lens with an optical laser input, characterized in that it further comprises a third corrective lens, rotated translucent mirror, photocell, LED and voltage source, while between optical the first output of the optoelectronic converter and the second corrective lens are the optically connected first corrective lens and the rotated translucent mirror, the optical output of the optoelectronic converter is also connected through the first corrective lens and the rotated translucent mirror to the optical input of the photocell, the output of which is connected to the input of the LED connected to the output of the source voltage, the optical output of the LED is connected through a third corrective lens and rotated in uprozrachnoe mirror with the second corrective lenses.