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发明公开
CN104280901A 光隔离器 有权

光隔离器
摘要：
本发明的目的在于提供一种600nm～800nm波长范围用的小型化光隔离器，其适合于作为在医疗、光测量中使用的半导体激光器中的光隔离器。本发明是600nm～800nm波长范围用的光隔离器，其特征在于，该光隔离器具备法拉第转子和配置在该法拉第转子外周的中空磁铁，所述法拉第转子由包含99％以上的下式(I)所示的氧化物的氧化物材料构成，并且，在633nm波长的费尔德常数为0.90min/(Oe·cm)以上，其中，配置法拉第转子的样品长L(cm)处于下述式(1)的范围内，对法拉第转子施加的磁通密度B(Oe)处于下述式(2)的范围内。(TbxR1-x)2O3(I)在上式(I)中，x为0.5≦x≦1.0；R包含选自由钪、钇和除Tb以外的镧系元素组成的集合中的至少一种以上的元素。0.6≦L≦1.1(1)B≦0.5×104(2)。
摘要（英）：

The present invention is about an optical isolator for use with a wavelength band of 600-800 nm having a Faraday rotator made of an oxide material containing an oxide represented by formula (I) in an amount of 99% or higher and having a Verdet constant of 0.90 min/Oe*cm or greater in the case of a wavelength band of 633 nm, and a hollow magnet arranged to surround the Faraday rotator, and the invention is also characteristic in that the sample length L (cm) along which the Faraday rotator is arranged is in the range represented by inequality (1) and that the magnetic flux density B (Oe) impressed on the Faraday rotator is in the range represented by inequality (2) (TbxR1-x)2O3 (I), wherein 0.5<=x<=1.0, and R is at least one element selected from scandium, yttrium and any lanthanoid but Tb; 0.6<=L<=1.1 (1) B<=0.5*10<4> (2).

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