Welcome to our websites!
section02_bg(1)
head(1)

China Wholesale Photocell Characterization Factory – LPT-11 Serial Experiments on Semiconductor Laser – Labor

Short Description:


Product Detail

Product Tags

Related Video

Feedback (2)

Dedicated to strict high-quality management and considerate shopper company, our experienced team associates are normally available to discuss your requirements and ensure full shopper gratification for Hall Effect, Newton"s Ring, Photoelectric Characteristic, It is our great honor to meet your demands.We sincerely hope we can cooperate with you in the near future.
China Wholesale Photocell Characterization Factory – LPT-11 Serial Experiments on Semiconductor Laser – Labor Detail:

Description

By measuring the power, voltage and current of a semiconductor laser, the students can understand the working characteristics of a semiconductor laser under continuous output. Optical multichannel analyzer is used to observe the fluorescence emission of semiconductor laser when the injection current is less than the threshold value and the spectral line change of laser oscillation when the current is larger than the threshold current.

Laser generally consists of three parts
(1) Laser working medium
The generation of laser must choose the appropriate working medium, which can be gas, liquid, solid or semiconductor. In this kind of medium, the inversion of the number of particles can be realized, which is the necessary condition to obtain laser. Obviously, the existence of metastable energy level is very beneficial to the realization of the number inversion. At present, there are nearly 1000 kinds of working media, which can produce a wide range of laser wavelengths from VUV to far infrared.
(2) Incentive source
In order to make the inversion of the number of particles appear in the working medium, it is necessary to use certain methods to excite the atomic system to increase the number of particles in the upper level. In general, gas discharge can be used to excite dielectric atoms by electrons with kinetic energy, which is called electrical excitation; pulse light source can also be used to irradiate working medium, which is called optical excitation; thermal excitation, chemical excitation, etc. Various excitation methods are visualized as pump or pump. In order to obtain the laser output continuously, it is necessary to pump continuously to keep the number of particles in the upper level more than that in the lower level.
(3) Resonant cavity
With suitable working material and excitation source, the inversion of particle number can be realized, but the intensity of stimulated radiation is very weak, so it can not be applied in practice. So people think of using optical resonator to amplify. The so-called optical resonator is actually two mirrors with high reflectivity installed face to face at both ends of the laser. One is almost total reflection, the other is mostly reflected and a little transmitted, so that the laser can be emitted through the mirror. The light reflected back to the working medium continues to induce new stimulated radiation, and the light is amplified. Therefore, the light oscillates back and forth in the resonator, causing a chain reaction, which is amplified like an avalanche, producing a strong laser output from one end of the partial reflection mirror.

Experiments 

1. Output power characterization of semiconductor laser

2. Divergent angle measurement of semiconductor laser

3. Degree of polarization measurement of semiconductor laser

4. Spectral characterization of semiconductor laser

Specifications

Item

Specifications

Semiconductor Laser Output Power< 5 mW
Center Wavelength: 650 nm
Semiconductor Laser Driver 0 ~ 40 mA (continuously adjustable)
CCD Array Spectrometer Wavelength Range: 300 ~ 900 nm
Grating: 600 L/mm
Focal Length: 302.5 mm
Rotary Polarizer Holder Minimum Scale: 1°
Rotary Stage 0 ~ 360°, Minimum Scale: 1°
Multi-Function Optical Elevating Table Elevating Range>40 mm
Optical Power Meter 2 µW ~ 200 mW, 6 scales

Product detail pictures:

China Wholesale Photocell Characterization Factory –  LPT-11 Serial Experiments on Semiconductor Laser – Labor detail pictures


Related Product Guide:

Now we have highly developed devices. Our items are exported towards the USA, the UK and so on, enjoying a great popularity among the customers for China Wholesale Photocell Characterization Factory – LPT-11 Serial Experiments on Semiconductor Laser – Labor , The product will supply to all over the world, such as: Libya, Serbia, Florence, Customer's satisfaction is always our quest, creating value for customers is always our duty, a long term mutual-beneficial business relationship is what we are doing for. We are an absolutely reliable partner for you in China. Of course, other services, like consulting, can be offered too.
  • The company's products can meet our diverse needs, and the price is cheap, the most important is that the quality is also very nice.
    5 Stars By Mary from Bogota - 2018.06.18 17:25
    With a positive attitude of "regard the market, regard the custom, regard the science", the company works actively to do research and development. Hope we have a future business relationships and achieving mutual success.
    5 Stars By Joanne from Jordan - 2017.10.27 12:12
    Write your message here and send it to us