Reflector, fiber resonator, and fiber laser

专利名称：Reflector, fiber resonator, and fiber laser发明人：長谷川 和男,加藤 覚,岡崎 朋也,齋藤 和也申请号：JP2017179758申请日：20170920公开号：JP2019057552A公开日：20190411

摘要：Problem to be solved: to provide a reflector, a fiber resonator, and a fiber lasercapable of setting a precise reflection wavelength characteristic, and capable of beingable to cope with a shorter wavelength and high reliability. Solution: a gain fiber having acore portion with a rare earth element added and a high refractive index having apredetermined width and formed at a predetermined interval along the optical axisdirection of the gain fiber and formed in the entire cross section perpendicular to theoptical axis of the core portion and having a first refractive index An index containing arefractive index periodic structure having a low refractive index region having a secondindex of refraction which is formed adjacent to a rate region and a high index region andwhose width is a predetermined spacing and lower than the first indexIf the operatingwavelength of the reflecting mirror is. Lambda., the width of the i-th refractive indexperiod structure of the refractive index period structure is di and the refractive index is Ni,the Di is given by the following equation. Di = hi (. Lambda. \\/ (2. Multidot. Ni) +. Lambda.\\/ (4. Mu.)), hi represents a degree, and I is a natural number. Diagram

申请人：株式会社豊田研究所,トヨタ自動車株式会社,学校法人トヨタ学園

地址：愛知県長久手市横道４１番地の１,愛知県豊田市トヨタ町１番地,愛知県名古屋市天白区久方２丁目１２番地１

国籍：JP,JP,JP

代理人：中島 淳,加藤 和詳

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