A Secret Weapon For LGS Switch Crystal

A Secret Weapon For LGS Switch Crystal

Blog Article

and demonstrated. It is proved that a LGS crystal with reasonably superior problems threshold can be used because the electro-

Based upon Q-switching concept, the heartbeat width and peak electrical power are dependent on the cavity size, which suggests that in LGS Q-switching determined by the reversibility of optical exercise would make a larger pulse width, Regardless of the design troubles encountered Using the laser cavity. Though LGS Q-switched lasers having a rotated quarter wave plate or polarizer are already claimed, there isn't any Investigation on the mechanism supporting the appliance of This method. On this do the job, we theoretically assess the coupling concerning optical exercise and the electro-optic Houses of LGS in the Q-switching process and find that the only real outcome of optical exercise is often a rotation together the propagating course, which may be eliminated by simply rotating the quarter wave plate. Determined by the theoretical Examination, we built a LGS Q-switched laser in experiments having a Nd:LuVO4 crystal that has a considerable emission cross-part and a brief fluorescence lifetime25,26. This get the job done leads to the Procedure of a laser with a two hundred kHz repetition price in addition to a 5.1 ns pulse width, which symbolize the highest repetition fee and narrowest pulse width in Q-switched LGS crystal lasers.

Using the “odd transit time�?method in addition to a Nd:LuVO4 crystal possessing a significant emission cross-part and a short fluorescence life span since the acquire medium, a LGS electro-optic Q-switched laser was produced that has a repetition charge of two hundred kHz, regular output power of four.39 W and pulse width of five.1 ns. These success reveal that LGS may be used for a large repetition level Q-switch and free of piezoelectric ringing outcomes a minimum of in a repetition price of 200 kHz Which it can offer a sensible Q-switched laser having a tunable large repetition charge For most apps, such as components processing, laser ranging, distant sensing, etc.

Optical activity could be regarded as the birefringence of ideal-handed and remaining-handed circularly polarized mild with refractive indices of nR and nL31, respectively, wherever nR and nL is often expressed as:

You are downloading a complete-text provided by the authors of the publication. A preview of the full-textual content is furnished by Optica Publishing Team.

LGS crystal has a variety of applications: In combination with piezoelectric result, optical rotation outcome, its electro-optical influence efficiency is also really top-quality, LGS Pockels Cells have significant repetition frequency, large area aperture, slender pulse width, substantial ability, ultra-lower temperature and other situations are suited to LGS crystal EO Q -switch. We utilized the EO coefficient of γ eleven for making LGS Pockels cells, and picked its larger sized element ratio to reduce the half-wave voltage of LGS Electro-optical cells, that may be suitable for the electro-optical tuning of all- Solid-condition laser with larger energy repetition prices.

You do not have subscription use of this journal. Determine information can be obtained to subscribers only. You could possibly subscribe both being an Optica member, or as a licensed user of the establishment. Call your librarian or process administrator or

When compared with former noted lasers with LGS as Q-switcher21, this existing laser has some benefits during the repetition prices and pulse width which ought to be attributed for the shorter cavity duration (185 mm) and reduce applied electric powered voltage (3400 V). The shorter cavity established the shorter roundtrip time and shorter pulse width and was created determined by the “odd transit time�?structure which was proposed from the theoretical Investigation around the optical active and electro-optic results. The limitation of substantial repetition charges of the electro-optic Q-switched laser will be the piezoelectric effect which might deliver the “piezoelectric ring�? The LGS crystal has a little piezoelectric coefficient of 6 × ten−twelve C/N, which indicates that the “piezoelectric ring�?effect is negligible.

The thermal focal length of the Er:YSGG crystal was calculated using the resonator steadiness affliction while in the LD facet-pumped laser process, and thermal focal lengths beneath distinctive normal input optical powers ended up acquired. The grinding radius was calculated in accordance with the measured thermal focal duration, as well as the potent thermal lensing was compensated by grinding adverse curvatures on the crystal .

To focus on the impact of optical activity about the birefringence, the polarization state is often simplified to:

By inserting the polarizer, Q-switch and QWP in the cavity, a Q-switched laser is received by making use of a driving voltage. A plot on the output electricity vs. the absorbed pump electricity with repetition costs ranging from twenty kHz to two hundred kHz is presented in Fig. one(a). From this determine, it is obvious that the output power is depending on the repetition charge and raises both being an will increase from the absorbed pump ability and repetition amount. With the absorbed pump power of sixteen.five W, the maximum output electric power was measured being 3.

We report on producing three flashlamp-pumped electro-optically Q-switched Cr:Er:YSGG lasers While using the Q-switch based upon a La3Ga5SiO14 crystal. The “brief�?laser cavity was optimized for prime peak ability apps. In this particular cavity, three hundred mJ output energy in fifteen ns pulses in a 3 Hz repetition price was shown with pump Power under 52 J.

In summary, the interaction between optical action and electro-optic house was theoretically analyzed and an “odd transit time�?design was produced, which implies that by rotating the quarter wave plate, the optical activity might be removed along with the Q-switching performances is usually realized when the light transits the Q-switch with odd periods. Compared Together with the former “even transit time�?technique connected with the reversibility of your optical activity30, the existing “odd transit time�?layout can simplify the configuration of your Q-switched laser cavity when using an optically active electro-optic crystal as the Q-switch.

Unique laser-tissue interaction mechanisms are discussed, and more info the present strategies for characterization of extent of damage are introduced. A novel strategy of employing a targeted laser beam from an ultrashort pulse laser resource to ablate the subcutaneous tumors with nominal thermal effects is launched. The extent of laser-induced harm is researched by determining the Room-time expression styles of heat shock proteins.

This Web page utilizes cookies to provide many of our products and services together with for analytics and to provide you a more customized working experience.