Photoelectric property integrated test system for organic laser device

Abstract

The invention discloses an organic laser device photoelectric performance integrated test system comprising an optical pumping test module comprising a laser used for generating laser acting on a to-be-tested sample; the electric pumping test module comprises a power meter, and the power meter is used for generating a high-voltage short pulse acting on the to-be-tested sample; wherein the laser is used for generating a trigger signal to trigger the power supply meter, so that the same-frequency output of an optical signal on the optical pumping test module and an electric signal on the electric pumping test module is realized. According to the invention, the laser is used as a trigger signal source and is used for triggering the power meter, so that the same-frequency output of optical pumping and electric pumping signals is realized, and the device performance under the condition of simultaneous pumping of light and electricity can be effectively tested based on the signals output at the same frequency. The method can be widely applied to the technical field of photoelectric testing.

Description

Technical Field

[0001] The invention relates to the technical field of photoelectric testing, and in particular to an integrated testing system for photoelectric performance of an organic laser device. Background Art

[0002] At present, laser media such as organic dyes and crystals have been widely used in optically pumped lasers. Their advantages such as high fluorescence efficiency, adjustable laser wavelength, easy processing, and low cost have left a strong mark in various fields. At present, the characterization of the laser performance of organic materials is focused on the performance under light excitation in thin film and solution states. Limited by the lack of good electrically injected organic laser devices, the laser performance characterization of electrically injected organic laser devices has not yet been developed. In addition, the driving conditions of electrically injected organic laser devices are currently strict. They need to be driven by high voltages greater than 50V and electric pulses shorter than 100ns. The requirements for test equipment are extremely high. A corresponding source meter that can apply high-voltage short pulses is required, and a test system that can test high-frequency electrical signals is also required to measure more accurate performance. With the continuous development of processing technology and organic material performance, good electrically injected organic laser devices are about to be realized. Therefore, a set of matching test methods is needed to comprehensively obtain the performance information of electrically injected organic laser devices. This helps workers better understand the physical processes occurring inside the device. Understanding the excited state dynamics inside the device can help workers better optimize the device. A connection is formed between device preparation and device performance characterization, forming a positive cycle to realize organic electric pump laser devices with stable and excellent performance as soon as possible. Summary of the invention

[0003] In order to solve one of the technical problems existing in the prior art to at least a certain extent, an object of the present invention is to provide an integrated testing system for the optoelectronic properties of an organic laser device.

[0004] The technical solution adopted by the present invention is:

[0005] An integrated testing system for photoelectric performance of an organic laser device, comprising:

[0006] An optical pumping test module, comprising a laser, wherein the laser is used to generate laser light acting on a sample to be tested;

[0007] An electric pumping test module, comprising a power supply meter, the power supply meter is used to generate a high voltage short pulse acting on the sample to be tested;

[0008] The laser is used to generate a trigger signal to trigger the power meter, so as to achieve the same-frequency output of the optical signal on the optical pumping test module and the electrical signal on the electrical pumping test module.

[0009] Furthermore, after the optical signal and the electrical signal have the same frequency, the trigger time difference between the two signals is less than the trigger signal cycle length;

[0010] Wherein, the pump intensity corresponding to the optical signal and the pump intensity corresponding to the electrical signal are both independently tunable.

[0011] Furthermore, the delay of the trigger signal is adjustable, and the signal delay of the triggered power meter is tunable, and the adjustable time scales are all shorter than the duration of a trigger cycle.

[0012] Furthermore, the optical pumping test module also includes a reflector, a beam expander, an aperture, an attenuation plate combination, a spot adjustment unit and a spectrometer;

[0013] The laser pumps out a pulsed laser, which is reflected by the reflector and reaches the beam expander; after the laser is expanded by the beam expander, it is collimated by the aperture and the uneven part of the edge of the spot is filtered out; the laser emitted from the aperture passes through the attenuation plate combination to control the laser energy density pumped onto the material; the laser emitted from the attenuation plate combination is adjusted to the shape of the spot by the spot adjustment unit, and is finally pumped onto the sample to be tested; the spectrometer collects the optical signal on the sample to be tested through the optical fiber.

[0014] Furthermore, the optical pulse length of the laser is between 100 ns and 100 fs, and the emission wavelength is between 280 nm in ultraviolet and 1120 nm in infrared.

[0015] Furthermore, the number of the reflectors is greater than or equal to 1; the magnification of the beam expander is 2 to 4 times; and the OD value of the attenuation plate in the attenuation plate combination is 0-3.

[0016] Furthermore, the apertures are a pair, and the diameters thereof are larger than the diameter of the laser spot.

[0017] Furthermore, the light spot adjustment unit is a cylindrical mirror, and the focal length of the cylindrical mirror is greater than or equal to 5 cm.

[0018] Furthermore, the optical pumping test module also includes a power meter, and the power meter is used to detect the power of the laser emitted from the attenuation plate assembly.

[0019] Furthermore, the power measurement range of the power meter is nW to μW. The resolution of the spectrometer is ≤2nm.

[0020] Furthermore, the electric pump test module also includes an oscilloscope, a non-inductance resistor and a signal receiving device; the non-inductance resistor is connected in series between the power meter and the sample to be tested;

[0021] The non-inductive resistor is used to reduce the oscillation in the circuit and to detect the current in the circuit;

[0022] The oscilloscope is used to detect the voltage on the non-inductive resistor and the sample to be tested;

[0023] The signal receiving device collects the electrical signal on the sample to be tested.

[0024] Furthermore, the power meter is connected to the non-inductor resistor via a high-frequency data line.

[0025] Furthermore, the high-frequency data line can withstand a frequency of >500MHz, the pulse source meter used can output a voltage of 0-200V, a pulse width of <100ns, and a frequency of 0-1000Hz. The non-inductance resistor is 0-10000Ω.

[0026] Furthermore, the signal receiving device includes a spectrometer, a power meter and a photomultiplier tube.

[0027] Furthermore, the frequency of the photomultiplier tube is ≥400 MHz. The sampling frequency of the oscilloscope is >500 MHz.

[0028] The beneficial effect of the present invention is that the present invention uses a laser as a trigger signal source to trigger a power supply meter to achieve the same-frequency output of optical pumping and electrical pumping signals. The signal based on the same-frequency output can effectively test the performance of the device under simultaneous optical and electrical pumping. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the embodiments of the present invention or the drawings of related technical solutions in the prior art are introduced below. It should be understood that the drawings introduced below are only for the convenience of clearly describing some embodiments of the technical solutions of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 It is a structural block diagram of an integrated testing system for photoelectric performance of an organic laser device in an embodiment of the present invention;

[0031] Figure 2 is a structural block diagram of an optical pumping test module in an embodiment of the present invention;

[0032] Figure 3 is a structural block diagram of an electric pump test module in an embodiment of the present invention;

[0033] Figure 4 is an actual test optical path diagram of the optical pumping test module in an embodiment of the present invention;

[0034] Figure 5 is a graph of optical pumping test data of the sky blue light material in an embodiment of the present invention;

[0035] Figure 6 is a diagram of an actual test device for an electric pump test module in an embodiment of the present invention;

[0036] Figure 7 This is a graph of electric pumping test data of the sky blue light material in an embodiment of the present invention;

[0037] Figure 8 It is a diagram of the equipment for the photoelectric co-pump test scheme in an embodiment of the present invention;

[0038] Fig. 9 It is a spectrum diagram of the photoelectric co-pump test in an embodiment of the present invention. DETAILED DESCRIPTION

[0039] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and are not to be construed as limitations of the present invention. For the step numbers in the following embodiments, they are only provided for the convenience of explanation, and the order between the steps is not limited in any way, and the execution order of each step in the embodiment can be adaptively adjusted according to the understanding of those skilled in the art.

[0040] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0041] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0042] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0043] like Figure 1 As shown, this embodiment provides an integrated testing system for the optoelectronic performance of an organic laser device, including:

[0044] An optical pumping test module, including a laser, the laser is used to generate laser light acting on a sample to be tested;

[0045] An electric pump test module, including a power supply meter, which is used to generate a high voltage short pulse acting on the sample to be tested;

[0046] The laser is used to generate a trigger signal to trigger the power supply meter, so as to achieve the same frequency output of the optical signal on the optical pumping test module and the electrical signal on the electrical pumping test module.

[0047] In this embodiment, the laser is used as a trigger signal source to output a 5V square wave electrical signal which is transmitted to the power meter through a BNC transmission line. After the power meter receives the trigger electrical signal, the frequency and time position of the electrical pulse signal output by the power meter will be consistent with the trigger signal, so as to achieve the same frequency output of the optical pumping and electrical pumping signals.

[0048] In some embodiments, after the optical signal and the electrical signal have the same frequency, the trigger time difference between the two signals is less than the trigger signal cycle length, and the pump intensities of the optical signal and the electrical signal are independently tunable.

[0049] In some embodiments, the delay of the laser trigger signal is adjustable, and the delay of the triggered electric pulse source meter signal is tunable. The adjustable time scale is shorter than the duration of a trigger cycle.

[0050] See also Figure 2 As some embodiments, the optical pumping test module includes a laser, a reflector, a beam expander, an aperture, an attenuation plate combination, a spot adjustment unit and a spectrometer.

[0051] Specifically, a laser with a pulse width of nanoseconds to femtoseconds pumps out a pulsed laser, and the laser wavelength corresponds to the absorption peak position of the measured material. The beam is expanded by a beam expander through a multi-path reflector, and the beam is collimated through an aperture and the uneven part of the edge of the spot is filtered out. After that, it passes through a combination of attenuators to control the laser energy density pumped onto the material, and the spot shape is adjusted through a cylindrical mirror or other lens and finally pumped onto the sample. Optical fibers can be placed on the side and back of the sample to transmit the optical signal to the spectrometer to obtain the laser information of the material.

[0052] As a further optional implementation, the optical pulse length of the laser is between 100 ns and 100 fs, and the emission wavelength is between 280 nm in ultraviolet and 1120 nm in infrared.

[0053] As a further optional implementation, the magnification of the beam expander used is 2 to 4 times, the number of reflectors used is ≥1, the aperture is a pair and the diameter is larger than the laser spot diameter, the OD value of the attenuation plate used is 0-3, and the focal length of the cylindrical mirror is ≥5cm.

[0054] As a further optional implementation, the optical pumping test module further includes a power meter, and the power measurement range of the power meter is nW to μW.

[0055] As a further optional implementation, the spectrometer resolution is ≤2 nm.

[0056] See also Figure 3 As some embodiments, the electric pump test module includes a power meter, an oscilloscope, a non-inductive resistor, and a signal receiving device.

[0057] Specifically, a source meter that can generate high voltage short pulses is used, and a BNC line is used to divide the positive and negative ends and connect to the positive and negative poles of the device. A non-inductive resistor is connected in series to reduce the oscillation in the circuit and is used to detect the current in the circuit. The voltage applied to the sample device and the voltage of the resistor are detected by an oscilloscope. The signal emitted by the final sample device after power is turned on can be monitored by spectrometers, power meters, photomultiplier tubes and other equipment as needed.

[0058] As an optional implementation, the high-frequency data line can withstand a frequency of >500 MHz, the pulse source meter used can output a voltage of 0-200 V, a pulse width of <100 ns, and a frequency of 0-1000 Hz. The non-inductive resistor is 0-10000Ω.

[0059] As a further optional implementation, the frequency of the photomultiplier tube used is ≥400 MHz.

[0060] As a further optional implementation, the oscilloscope sampling frequency is greater than 500 MHz.

[0061] The above system is further described below in conjunction with the accompanying drawings and specific embodiments.

[0062] (1) Optical pumping test solution

[0063] See also Figure 4 In the optical pumping test module, the laser used is a femtosecond high-energy amplifier laser system from Spectral Physics, which consists of the following accessories: Ti:sapphire oscillator (MaiTai); Ti:sapphire regenerative amplifier (Spitfire-ACE): wavelength-tunable optical parametric amplifier (TOPAS Prime). It can eventually output 5-450mW, 0-1kHz, ~120fs, 285nm-1100nm laser. The reflectors, apertures, beam expanders, attenuation plate combinations, and cylindrical mirrors used were purchased from Tholabs and are suitable for the 350-400nm ultraviolet band. The power meter used was purchased from OPHIR and is equipped with 3 power sensors that can detect pW-mW power. The spectrometer used is the Ocean Optics PRO model with a spectral resolution of 2.2nm. Figure 5 The data obtained for the test.

[0064] (2) Electric pump test solution

[0065] See also Figure 6 In the electric pump test module, the pulse power meter used is AVTECH / AVR-3H3-B, which can output 0-200V and electric pulse signals with a pulse width of ≥50ns. The oscilloscope used is a Tektronix 4series series oscilloscope with a sampling frequency of 1GHz. The non-inductive resistor used is the Ohmite series composite ceramic resistor with a resistance value of 10-10000Ω. The photomultiplier tube used is THORLABS's APD4302A, with a bandwidth of 400MHz and a gain of 0-100. The spectrometer and power meter used are consistent with those in the optical pump test scheme. The data obtained from the electric pump test scheme are as follows Figure 7 As shown, Figure 7 (a) is a test diagram of the IVL performance of the sky blue light device. Figure 7 (b) is a schematic diagram of the current signal passing through the device. Figure 7 (c) is a schematic diagram of the transient EL signal of the device.

[0066] (3) Photoelectric co-pump test solution

[0067] See also Figure 8 , the test equipment in the above optical pumping test scheme and the electric pumping test scheme are processed synchronously to achieve the synchronous input of laser pumping and electric pulse pumping to the laser device and the synchronous acquisition of the corresponding signals. The data obtained from the test of the optical and electrical co-pumping test scheme is as follows Fig. 9 shown.

[0068] In summary, in this example, the following experimental invention objectives are achieved by synchronously outputting signals of the optical pumping test scheme and the electrical pumping test scheme:

[0069] (1) This example implements accurate optical pumping testing and can accurately test the laser threshold of the optical pumping laser device.

[0070] (2) This example realizes the output of short pulse electrical pump signals, and is able to apply electrical pulses as short as 50 ns to the device and test the corresponding data.

[0071] (3) This example realizes the synchronous output of optical pumping and electrical pumping, and can accurately obtain the output data of the device.

[0072] In the above description of this specification, the description with reference to the terms "one embodiment / example", "another embodiment / example" or "certain embodiments / examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0073] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

[0074] The above is a specific description of the preferred implementation of the present invention, but the present invention is not limited to the above embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. An integrated testing system for the optoelectronic performance of an organic laser device, characterized in that: include: An optical pumping test module, comprising a laser, wherein the laser is used to generate laser light acting on a sample to be tested; An electric pumping test module, comprising a power supply meter, the power supply meter is used to generate a high voltage short pulse acting on the sample to be tested; The laser is used to generate a trigger signal to trigger the power meter, so as to achieve the same frequency output of the optical signal on the optical pumping test module and the electrical signal on the electrical pumping test module.

2. The integrated testing system for optoelectronic performance of an organic laser device according to claim 1, characterized in that: After the optical signal and the electrical signal have the same frequency, the trigger time difference between the two signals is less than the trigger signal cycle length; Wherein, the pump intensity corresponding to the optical signal and the pump intensity corresponding to the electrical signal are both independently tunable.

3. The integrated testing system for optoelectronic performance of an organic laser device according to claim 1, characterized in that: The delay of the trigger signal is adjustable, and the signal delay of the triggered power meter is tunable, and the adjustable time scales are all shorter than the duration of a trigger cycle.

4. The integrated testing system for photoelectric performance of an organic laser device according to claim 1, characterized in that: The optical pumping test module also includes a reflector, a beam expander, an aperture, an attenuation plate combination, a spot adjustment unit and a spectrometer; the laser pumps out a pulsed laser, which reaches the beam expander after being reflected by the reflector; after the laser is expanded by the beam expander, it is collimated by the aperture and the uneven part of the edge of the spot is filtered out; the laser emitted from the aperture passes through the attenuation plate combination to control the laser energy density pumped onto the material; the laser emitted from the attenuation plate combination adjusts the shape of the spot through the spot adjustment unit, and is finally pumped onto the sample to be tested; the spectrometer collects the optical signal on the sample to be tested through the optical fiber.

5. The integrated testing system for photoelectric performance of an organic laser device according to claim 4, characterized in that: The number of the reflectors is greater than or equal to 1; the magnification of the beam expander is 2 to 4 times; and the OD value of the attenuation plate in the attenuation plate combination is 0-3.

6. The integrated testing system for optoelectronic performance of an organic laser device according to claim 4, characterized in that: The light spot adjustment unit is a cylindrical mirror, and the focal length of the cylindrical mirror is greater than or equal to 5 cm.

7. The integrated testing system for photoelectric performance of an organic laser device according to claim 4, characterized in that: The optical pumping test module further includes a power meter, which is used to detect the power of the laser emitted from the attenuation plate assembly.

8. The integrated testing system for photoelectric performance of an organic laser device according to claim 1, characterized in that: The electric pump test module also includes an oscilloscope, a non-inductive resistor and a signal receiving device; the non-inductive resistor is connected in series between the power meter and the sample to be tested; The non-inductive resistor is used to reduce the oscillation in the circuit and to detect the current in the circuit; The oscilloscope is used to detect the voltage on the non-inductive resistor and the sample to be tested; The signal receiving device collects the electrical signal on the sample to be tested.

9. The integrated testing system for photoelectric performance of an organic laser device according to claim 8, characterized in that: The power meter is connected to the non-inductive resistor via a high-frequency data line.

10. The integrated testing system for optoelectronic performance of an organic laser device according to claim 8, characterized in that: The signal receiving device includes a spectrometer, a power meter and a photomultiplier tube.

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