About LGS Switch Crystal
About LGS Switch Crystal
Blog Article
wherever n contains nx and ny, the refractive indices together the X- and Y- directions as light-weight propagates in an optically Lively crystal alongside the Z- direction.
Based upon Q-switching idea, the heart beat width and peak ability are depending on the cavity duration, which suggests that in LGS Q-switching determined by the reversibility of optical exercise would crank out a bigger pulse width, Despite the look difficulties encountered While using the laser cavity. Whilst LGS Q-switched lasers that has a rotated quarter wave plate or polarizer are described, there isn't a Examination about the mechanism supporting the appliance of this technique. In this get the job done, we theoretically evaluate the coupling between optical action and also the electro-optic Houses of LGS throughout the Q-switching process and learn that the only real impact of optical action is usually a rotation along the propagating route, that may be removed simply by rotating the quarter wave plate. Depending on the theoretical Examination, we constructed a LGS Q-switched laser in experiments that has a Nd:LuVO4 crystal that has a sizable emission cross-segment and a short fluorescence lifetime25,26. This perform ends in the operation of a laser having a 200 kHz repetition price as well as a 5.1 ns pulse width, which represent the best repetition level and narrowest pulse width in Q-switched LGS crystal lasers.
By having an optically Energetic langasite (LGS) crystal because the electro-optic Q-switch, we demonstrate an economical Q-switched laser with a repetition level of two hundred kHz. Depending on the theoretical Examination from the conversation concerning optical exercise and electro-optic property, the optical exercise from the crystal has no impact to the birefringence in the course of Q-switching if the quarter wave plate utilised was rotated to align With all the polarization way. With a Nd:LuVO4 crystal possessing a big emission cross-portion and a short fluorescence lifetime since the attain medium, a stable LGS Q-switched laser was designed with common output energy of four.
Optical exercise is usually looked upon as the birefringence of suitable-handed and remaining-handed circularly polarized gentle with refractive indices of nR and nL31, respectively, wherever nR and nL is usually expressed as:
In the meantime, to make certain ongoing support, we're exhibiting the site with no models and JavaScript.
This rotation might be eradicated when the light propagates together the -Z course by Making the most of the reversibility of optical activity35.
Subjects could be refined more within the search engine results. The subject side will reveal the get more info superior-stage topics connected to the articles or blog posts returned within the search engine results. Unique COLLECTIONS
You do not have membership access to this journal. Cited by one-way links can be found to subscribers only. You may subscribe both being an Optica member, or as an authorized consumer within your institution. Speak to your librarian or procedure administrator or
The thermal focal size from the Er:YSGG crystal was calculated utilizing the resonator balance condition during the LD aspect-pumped laser method, and thermal focal lengths less than unique common enter optical powers have been obtained. The grinding radius was calculated in accordance with the measured thermal focal size, and also the strong thermal lensing was compensated by grinding adverse curvatures on the crystal .
To focus on the impact of optical activity about the birefringence, the polarization point out may be simplified to:
By inserting the polarizer, Q-switch and QWP in to the cavity, a Q-switched laser is obtained by making use of a driving voltage. A plot in the output electrical power vs. the absorbed pump energy with repetition fees ranging from twenty kHz to 200 kHz is introduced in Fig. 1(a). From this figure, it is evident the output power is depending on the repetition rate and improves equally being an will increase of the absorbed pump electricity and repetition rate. Using an absorbed pump power of 16.5 W, the most output power was measured to get three.
By rotating the quarter wave plate, the electro-optic crystal with optical activity can make electro-optic modulation comparable to those crystals without any optical action, for example KD*P29 and BBO36. As opposed With all the “even transit time”30 layout, and that is called follows: The sunshine propagates from the LGS crystal together the Z course after which you can together the -Z course in an effort to remove the result of optical exercise in the laser cavity30, the existing analyzed “odd transit time�?style and design calls for only the rotation of 1 / 4 wave plate Consequently simplifying the laser cavity configuration.
In summary, the interaction among optical exercise and electro-optic property was theoretically analyzed and an “odd transit time�?design and style was formulated, which implies that by rotating the quarter wave plate, the optical exercise can be eliminated along with the Q-switching performances is often understood when the light transits the Q-switch with odd occasions. In comparison Along with the past “even transit time�?process related to the reversibility of the optical activity30, the existing “odd transit time�?structure can simplify the configuration of your Q-switched laser cavity when applying an optically Lively electro-optic crystal as the Q-switch.
eight kHz, and an average output electric power of 877 mW had been produced. Contemplating the energized-point out absorption over the laser photons from the Er:Lu2O3 crystal, We have now simulated the dynamic means of self-pulsed generation by solving the rate equations numerically. The simulation effects are consistent with the typical attributes of the Q-switched laser.
This Web page utilizes cookies to provide some of our services and products and for analytics and to provide you a more personalised working experience.