{"product_id":"injection-locked-high-power-oscillator-for-advanced-gravitational-wave-observatories-von-lutz-winkelmann","title":"Injection-locked high power oscillator for advanced gravitational wave observatories","description":"\u003cp\u003eOne approach to detect gravitational waves, which have been postulated by Albert Einstein in his General Theory of Relativity, is based on interferometric measurements of\u003c\/p\u003e\u003cp\u003elength variations with a large-scale Michelson interferometer. The detection range of these\u003c\/p\u003e\u003cp\u003eground-based observatories is currently limited to approx. 15 Megaparsec (Mpc) because\u003c\/p\u003e\u003cp\u003eof a reduced sensitivity at detection frequencies of 10 Hz ¿ 10 kHz by shot noise. These\u003c\/p\u003e\u003cp\u003elimitations can be overcome by an output power increase of the detector¿s light source,\u003c\/p\u003e\u003cp\u003ewhich will enhance the sensitivity by an order of magnitude. Thus, the possibility of detecting a gravitational wave will be raised by a factor of 1000 and the detection range will be increased to 150 Mpc, accordingly.\u003c\/p\u003e\u003cp\u003eIn this work a laser systems is presented, which fulfills the free-running laser requirements\u003c\/p\u003e\u003cp\u003eon stability and beam quality required by the next generation of gravitational wave detectors for the first time. The developed laser system is based on a two-stage concept,\u003c\/p\u003e\u003cp\u003esupplemented with an active amplitude and frequency stabilization, which is not part\u003c\/p\u003e\u003cp\u003eof this work. A 35 W Nd:YVO4 amplifier system with an emission wavelength of 1064\u003c\/p\u003e\u003cp\u003enm represents the frequency reference of the laser system and is used as the seed for an\u003c\/p\u003e\u003cp\u003einjection-locked high power oscillator. This amplifier, which is based on a Master Oscillator\u003c\/p\u003e\u003cp\u003ePower Amplifier scheme, is already used in today¿s gravitational wave detectors and has\u003c\/p\u003e\u003cp\u003ebeen proven to be reliable in long-term operation. The linearly polarized output power of\u003c\/p\u003e\u003cp\u003emore than 200 W is generated inside the oscillator stage, which consists of four Nd:YAG\u003c\/p\u003e\u003cp\u003ecrystals arranged in an asymmetric ring resonator configuration. To compensate for losses\u003c\/p\u003e\u003cp\u003edue to thermal birefringence inside the longitudinally pumped laser crystals, an imaging\u003c\/p\u003e\u003cp\u003edepolarization compensation is used.\u003c\/p\u003e\u003cdiv class=\"aw-variant-hidden-subtitle-div\" id=\"aw-variant-subtitle-9783954041183\"\u003e\u003ch3\u003e\u003c\/h3\u003e\u003c\/div\u003e","brand":"Autorenwelt Shop","offers":[{"title":"Softcover - 9783954041183","offer_id":40125881876573,"sku":"9783954041183","price":31.83,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0622\/files\/ac0751e3-b115-40b3-bf71-5c55932ba9b8.jpg?v=1756878903","url":"https:\/\/shop.autorenwelt.de\/products\/injection-locked-high-power-oscillator-for-advanced-gravitational-wave-observatories-von-lutz-winkelmann","provider":"Autorenwelt Shop","version":"1.0","type":"link"}