1600nm Er YAG Laser For Optical Communication - Laser Crylink

1600nm laser is suitable for optical communication. 1600nm is located in the safe band of the human eye. And 1600nm is located in one of the atmospheric laser transmission windows, the transmission distance is farther, the corresponding distance and resolution and speed resolution are more accurate, and the corresponding photodetector parts have high detection sensitivity.

Theory of 1600nm Er YAG laser


Gain medium - Er：YAG

The 4I11/2~4I13/2 and 4I13/2~4I15/2 transitions of the Er3+ ion produce laser radiation in two mid-infrared bands. The wavelength of the 4I11/2~4I13/2 transition is 2.7 μm~3 μm. 4I13/2~4I15/2 can emit at a wavelength of around 1.6 μm, which can meet the needs of space optical communication and other fields.

E-O Q-switch：BBO

Electro-optical Q-switching is to realize Q-modulation by using the electro-optic effect of the crystal, inserting a polarizer in the cavity, and using a polarizing plate to polarize and detect the wavelight. The use of BBO crystals as electro-optic crystals has following advantages: no birefringence effect, high damage threshold, and low insertion loss. Pressurized electro-optic Q-switching requires the insertion of a quarter-wave plate（QWP）between the electro-optic crystal BBO and the polarizer.

Mirror——M1 – input mirror. High-transmittance for 808nm pump light, and high-reflection for 1.6μm. M2 – output mirror. High-reflection for 808nm, and it is transmittance for 1.6μm is 13%.

Feature

· At atmospheric transmission window

· In the human eye safety band

· Long transmission distance

· Good beam quality

Application

Coherent Doppler Radar Source

With the continuous deterioration of the global environmental climate, the data demand for atmospheric wind field is becoming more and more urgent. The coherent Doppler laser wind radar has high measurement accuracy and large measurable range, and has gradually become the main tool of atmospheric wind field. The Er:YAG crystal produces a 1.6μm band laser due to its 4I13/2~4I15/2 transition, which is just in the range of the opaque cornea of the human eye, and because its wavelength range is located in the atmospheric transmission window, the transmission loss in the atmosphere is small, so it acts as a laser radar source have certain research significance.

Verdict

Compared with other band lasers, lasers with a working wavelength of 1.6μm are located in the human eye safety band and are also in the atmospheric transmission window. They have wide application and good development prospects in the fields of laser radar and space free communication.

Please do not hesitate to contact us if you have any questions regarding our products.

评论

发表评论

此博客中的热门博文

Pockels Cells Crystal

1. Pockels Cells Based on the electro-optic effect , when the applied electric area acts on the Pockels cell crystal ( electro-optic crystal ), the Pockels cell crystal (electro-optic crystal) is like a wave plate whose phase delay is related to the used electric field. The polarization state of the outbound light from the Pockels cell crystal will certainly change so that the strength as well as amplitude of the outbound light from the analyzer are regulated, which is electro-optic inflection, and the modulation tool is called a Pockels cell. 2. Pockels cell crystal The crystals that produce the electro-optical effect are called Pockels cell crystals, that is, electro-optical crystals. They each have their benefits. Presently, the major Pockels cell crystals on the marketplace consist of BBO crystals , DKDP crystals , KTP crystals , as well as LN (LiNbO3) crystals . (1) BBO crystal BBO crystal , additionally called barium metaborate crystal, chemical formula BaB2O4, is an electro-opt
阅读全文
图片
  YCOB nonlinear crystal – Laser Crylink laser crylink Description YCOB crystal is one of the most widely used nonlinear optical crystals. Its nonlinear optical coefficient is equivalent to that of BBO crystal and LBO crystal. The effective frequency multiplication coefficients of the second and third order reach 2, 8 and 1, 4 times of KDP respectively. The YCOB crystal has the following advantages : large aperture, high damage intensity in femtosecond regime,about2000-2500GW/cm2 wide allowable Angle range and allowable temperature range, small dispersion Angle, shorter growth period by Cz method. At the same time, it has stable physical and chemical properties (non-deliquescent) and good machining properties. Therefore, it is considered to have good application prospects of blue-green light and UV band optical frequency multiplier crystal. Feature · Electric resistivity is high · Temperature acceptance is high · Laser induce damage threshold is high · Less anisotropy · Thermal expansi
阅读全文

Nd: YVO4 crystal qualities

图片
Neodymium doped yttrium vanadate (Nd: YVO4) is a kind of laser crystal extensively utilized at present. It has superb efficiency as well as is among the major laser crystals for semiconductor pumped solid state lasers today. Nd: YVO4 crystal is a tetragonal crystal, belonging to the uniaxial crystal system, which is composed of doped ion Nd and also laser matrix YVO4. Compared to another frequently utilized Nd: YAG crystal, Nd: YVO4 has the advantage of higher absorption coefficient. In a specific variety of absorption transmission capacity, the absorption effectiveness of Nd: YVO4 is 5 times that of Nd: YAG, the transmission capacity is 2.4-6.3 times that of Nd: YAG, as well as the peak wavelength of the absorption top is reached at concerning 808nm, which has satisfied the requirements of present high-power laser diodes. The boosted sample of Nd: YVO4 at 1064nm and also 1342nm are bigger, and also the boosted random sample of Nd: YAG at 1064nm have to do with 3 times that of Nd: YAG
阅读全文