{"product_id":"efficient-frequency-doubling-of-near-infrared-diode-lasers-using-quasi-phase-matched-waveguides-von-daniel-jedrzejczyk","title":"Efficient frequency doubling of near-infrared diode lasers using quasi phase-matched waveguides","description":"\u003cp\u003eSingle-pass frequency doubling of near-infrared (NIR) diode lasers in nonlinear bulk crystals allows to realize compact lasers in the green spectral region, offering continuous-wave (CW) laser radiation characterized by a high spectral brightness. In order to increase the efficiency of such laser systems, the application of quasi phase-matched waveguide structures instead of bulk crystals is investigated theoretically and experimentally. In particular, a complemented study of second-harmonic generation (SHG) in periodically poled MgO-doped lithium niobate (MgO:LN) ridge and planar waveguides is conducted. This study aims at identifying benefits and limitations for both geometries with respect to maximum conversion efficiency and accessible power.\u003c\/p\u003e\u003cp\u003eThe application of waveguide structures presented in this thesis results in a distinct improvement of the opto-optical conversion efficiency ¿ from approximately 20¿% in a bulk crystal to almost 30¿% in a planar waveguide, and to around 40¿% in a ridge waveguide. A maximum second-harmonic power of nearly 0.4 W in a ridge waveguide and 1.2 W in planar waveguide is reached. The generated laser radiation in the green spectral range is characterized by a single-frequency spectrum and nearly diffrac-tion-limited beam quality and thus ideally suited for applications in bio-medicine, bio-technology, and spectroscopy.\u003c\/p\u003e\u003cdiv class=\"aw-variant-hidden-subtitle-div\" id=\"aw-variant-subtitle-9783954049585\"\u003e\u003ch3\u003e\u003c\/h3\u003e\u003c\/div\u003e","brand":"Libri","offers":[{"title":"Softcover - 9783954049585","offer_id":39463001784413,"sku":"9783954049585","price":27.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0622\/files\/6bb30dd8-e8f1-44f1-98be-08907c445509.jpg?v=1776496510","url":"https:\/\/shop.autorenwelt.de\/products\/efficient-frequency-doubling-of-near-infrared-diode-lasers-using-quasi-phase-matched-waveguides-von-daniel-jedrzejczyk","provider":"Autorenwelt Shop","version":"1.0","type":"link"}