{"product_id":"compact-semiconductor-based-laser-sources-with-narrow-linewidth-and-high-output-power-von-stefan-spiessberger","title":"Compact Semiconductor-Based Laser Sources with Narrow Linewidth and High Output Power","description":"\u003cp\u003eThis work presents a fully semiconductor-based laser source that meets the requirements of coherent optical communication links in space and further allows to benefit from the numerous advantages of semiconductor lasers. A hybrid master oscillator power amplifier\u003c\/p\u003e\u003cp\u003e(MOPA) concept enables narrow-linewidth high-power operation.\u003c\/p\u003e\u003cp\u003eThe experimental part of this thesis describes how the linewidth of the laser sources is characterized with a beat note measurement technique. A novel heterodyne linewidth measurement setup with a weak frequency lock of the two lasers features a virtually unlimited resolution. The analysis of the beat note signal is carried out by evaluating radio frequency beat note spectra as well as frequency noise spectra.\u003c\/p\u003e\u003cp\u003eFurther, the characteristics of DFB and DBR lasers optimized for narrow linewidth operation are compared in terms of spectral stability, linewidth, and performance in a master oscillator power amplifier system. DBR lasers with an overall length of 4mm and\u003c\/p\u003e\u003cp\u003ea front facet reflectivity of 30% feature an intrinsic linewidth of 2 kHz at 180mW and a FWHM linewidth as small as 180 kHz up to an output power of 180mW. An intrinsic linewidth of 2 kHz is, to our knowledge, the smallest linewidth that has been reported in the literature so far.\u003c\/p\u003e\u003cp\u003eThe concept of a hybrid integrated MOPA has been developed and the assembly procedure and the characteristics of the micro-integrated MOPA system are presented.\u003c\/p\u003e\u003cp\u003eThe MOPA is realized on a footprint of 10 × 5mm2. The MOPA system features an output power of more than 1W, a FWHM linewidth of 100 kHz and an intrinsic linewidth\u003c\/p\u003e\u003cp\u003eof 3.6 kHz. To our knowledge, this is the first micro-integrated MOPA concept that simultaneously features narrow linewidth and addresses the requirements of spaceborne laser sources like mechanical stability, compactness, and efficiency.\u003c\/p\u003e\u003cdiv class=\"aw-variant-hidden-subtitle-div\" id=\"aw-variant-subtitle-9783954042616\"\u003e\u003ch3\u003e\u003c\/h3\u003e\u003c\/div\u003e","brand":"Autorenwelt Shop","offers":[{"title":"Softcover - 9783954042616","offer_id":40129815019613,"sku":"9783954042616","price":24.15,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0622\/files\/9b9766b9-1ee5-469b-939e-d8b577f793fb.jpg?v=1756877842","url":"https:\/\/shop.autorenwelt.de\/en\/products\/compact-semiconductor-based-laser-sources-with-narrow-linewidth-and-high-output-power-von-stefan-spiessberger","provider":"Autorenwelt Shop","version":"1.0","type":"link"}