Passive Q-switch crystals
A Passive Q-switch is a device that can attain a Q-switch by making use of the reality that the passage of optical material depends upon the laser strength at a specific wavelength. The laser freeze linker mainly produces saturated absorbent crystals in passive Q-switched crystals. The absorption coefficient of saturated absorption crystal reduces with the increase of event light strength. When the saturation value is gotten to, the loss (Q value) in the laser tooth cavity is regulated, as well as the pulse is produced.
เล่นสล็อตโรม่าฟรีเพียงสมัครสล็อต joker กับ เว็บของเรา
สุดคุ้มเมื่อ สมัครสล็อตjoker กับ เว็บของเรา สล็อตเว็บตรงแตกง่าย เพราะว่าที่นี่แหล่ง เข้าjoker สล็อต ที่มากับเงินโบนัส เครดิตฟรีเยอะมากเลย โดยเมื่อท่านสนใจเข้าร่วม joker สล็อต ฟรีเครดิต เราเปิดให้ท่านเข้าเล่นกับสล็อตโรม่าได้ด้วย หากท่านได้ยินชื่อเสียงของสล็อต Roma ท่านจะทราบว่าท่านมีโอกาสอย่างมากเพียงใดที่ท่านจะได้รับเงินรางวัลก้อนโต เกมที่มากับธีมในรูปแบบของนักรบโรมัน ด้วยกติกา และการจ่ายเงินที่เล่นอย่างเร้าใจ อีกทั้งในส่วนของเงินรางวัล ตัวคูณ โบนัส มีครบ ลุ้นรับเงินรางวัลที่ท่านต้องการอย่างง่าย ๆ เมื่อท่านเข้ามาร่วมสนุกสนานไปกับสล็อตโรม่าที่ เว็บของเรา เปิดรับสมัครผุ้สนใจเข้าร่วมเล่นทุกวันไม่เว้นวันหยุดเลย
Some passive Q-switching crystals are listed here:
1. Co: Spinel passive Q-switch crystals
Co: Spinel crystal, named cobalt spinel, is a newly established product. Its releasing wavelength array is 1.2-1.6 μm, which has shown to be an extremely effective passive Q-switched switch. It is commonly utilized in the eye-safe Er: glass laser (1.54 µm) and also has actually been verified in lasers with wavelengths of 1.44 µm and 1.34 µm. Co: Mgal2o4( Co: spinel) has a high absorption cross-section, enabling Q switching of Er: glass lasers (flash and also diode laser pumps) without cavity focusing. The minimal excited state absorption results in a high comparison proportion of the Q switch. That is, the proportion of the preliminary to saturated soaked-up signal is higher than 10.
The main characteristics of Co: Spinel crystal:
- – 1.3 to 1.6 mu m within the scope of the reduced optical loss
- – high damages limit
Main applications of Co: Spinel crystals:
- – passive q-switched @ 1.54 microns
2. V: YAG passive Q-switch crystals
V: YAG crystal, the Chinese name vanadium-doped yttrium aluminum garnet, is a relatively new crystalline product. Ideal for 1.06 ~ 1.44 μm laser emission, particularly for 1.3 μm Nd laser. The absorption top cross-section of the excited state is not obvious near the absorption optimal of 1300 nm. This material has excellent optical, mechanical, and also thermal residential or commercial properties. It can be produced by the Czochralski technique. V: YAG crystals can be used in Nd: YAG, Nd: YAP, Nd: KGW, Nd: YVO 4, and also other active media to obtain the passive Q-switched laser with the portable framework and exceptional performance.
Main attributes:
- – high-ground state absorption
- – not evident excited state absorption
- – Q switch high contrast
- – excellent optical buildings, mechanical residential or commercial properties, and also thermal buildings
- – ultraviolet resistant high damage threshold
Main application:
- – used in laser rangefinder, laser radar as well as the passive adjusting Q laser LIBS system
3. Cr: YAG
Cr4+: YAG crystal, Chinese name chromium doped yttrium aluminum garnet, is an excellent material for Q switching of laser (Nd: YAG and also other doping Nd or Yb) with wavelengths from 0.8 to 1,2 μm. A notable feature of Cr4+: YAG is its high damage limit of 500-1000 MW/cm2. Its absorption band prolongs from 800 nm to 1200 nm and reaches its height at concerning 1060nm, with a huge cross-sectional area of absorption peak.
Cr: YAG crystal Main features:
- – 500-1000 MW/cm2 high damage threshold
- – extremely stable chemical and also dependability
- – excellent thermal conductivity, long service life
- – compact passive Q switch
- – very easy to operate
Cr: YAG crystal Main application:
- – used for laser range finder, LIDAR, and LIBS passive adjusting Q laser system
- – need a short pulse laser system.
4. Cr: YSO passive Q-switch crystals
In 1991, it was discovered that Cr: YSO( pure tetravalent chromium collection) solid-state saturable absorbent could be utilized for laser applications.
In 1993, Chen et al. used Cr: YSO solid-state saturable absorber to successfully act on a 694.5 nm ruby laser.
The crystal’s wide-band absorption range (peaking at 390 nm, 595 nm, 695 nm, and 750 nm) prolongs from the noticeable area to the near-infrared area, making it a good switch for numerous lasers.
5. Cr: GSGG passive Q-switch crystals
Cr4+: GSGG can be made use of as a passive Q-switch in the 1.06 μm band. Compared with the traditional Cr4+: YAG passive Q-switched crystal, Cr4+: GSGG crystal has the following benefits:
The visible part is clear (calibration) as well as is a lot more useful to the laser light course. In 1.06 mu m band has a better absorption coefficient. At the same time, it also has a strong capability for anti-irradiation.
READ MORE
