OPTICAL ISOLATOR

To provide a compact optical isolator having transparency in violet and blue wavelengths of 400 to 470 nm.SOLUTION: The present invention provides a 400 to 470 nm wavelength-band optical isolator characterized by being provided with a Faraday rotor having a Verdet constant at least equal to 750 Rad/...

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Hauptverfasser: MAKIKAWA SHINJI, YAHAGI AKIRA
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creator MAKIKAWA SHINJI
YAHAGI AKIRA
description To provide a compact optical isolator having transparency in violet and blue wavelengths of 400 to 470 nm.SOLUTION: The present invention provides a 400 to 470 nm wavelength-band optical isolator characterized by being provided with a Faraday rotor having a Verdet constant at least equal to 750 Rad/T m at wavelengths of 400 nm to 470 nm, and a hollow magnet arranged at the outer circumference of the Faraday rotor, wherein a magnetic flux density B (T) applied to the Faraday rotor lies within the range of formula (1), and an optical path length L (cm) in which the Faraday rotor is arranged lies within the range of formula (2): B≤0.40 (1) and 0.26≤L≤0.50 (2).SELECTED DRAWING: Figure 1 【課題】紫及び青色波長400~470nmにおいて透明で小型化した光アイソレータを提供すること。【解決手段】波長400nm~470nmにおけるベルデ定数が750Rad/T・m以上のファラディ回転子と、前記ファラディ回転子の外周に配置される中空マグネットとを具備し、前記ファラディ回転子に印加される磁束密度B(T)が下記式(1)の範囲内にあり、前記ファラディ回転子が配置される光路長L(cm)が下記式(2)の範囲内にあることを特徴とする400~470nm波長帯域用光アイソレータ。B≦0.40 (1)0.26≦L≦0.50 (2)【選択図】図1
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YAHAGI AKIRA</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JP2022170038A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; jpn</language><creationdate>2022</creationdate><topic>OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS</topic><topic>OPTICS</topic><topic>PHYSICS</topic><toplevel>online_resources</toplevel><creatorcontrib>MAKIKAWA SHINJI</creatorcontrib><creatorcontrib>YAHAGI AKIRA</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>MAKIKAWA SHINJI</au><au>YAHAGI AKIRA</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>OPTICAL ISOLATOR</title><date>2022-11-10</date><risdate>2022</risdate><abstract>To provide a compact optical isolator having transparency in violet and blue wavelengths of 400 to 470 nm.SOLUTION: The present invention provides a 400 to 470 nm wavelength-band optical isolator characterized by being provided with a Faraday rotor having a Verdet constant at least equal to 750 Rad/T m at wavelengths of 400 nm to 470 nm, and a hollow magnet arranged at the outer circumference of the Faraday rotor, wherein a magnetic flux density B (T) applied to the Faraday rotor lies within the range of formula (1), and an optical path length L (cm) in which the Faraday rotor is arranged lies within the range of formula (2): B≤0.40 (1) and 0.26≤L≤0.50 (2).SELECTED DRAWING: Figure 1 【課題】紫及び青色波長400~470nmにおいて透明で小型化した光アイソレータを提供すること。【解決手段】波長400nm~470nmにおけるベルデ定数が750Rad/T・m以上のファラディ回転子と、前記ファラディ回転子の外周に配置される中空マグネットとを具備し、前記ファラディ回転子に印加される磁束密度B(T)が下記式(1)の範囲内にあり、前記ファラディ回転子が配置される光路長L(cm)が下記式(2)の範囲内にあることを特徴とする400~470nm波長帯域用光アイソレータ。B≦0.40 (1)0.26≦L≦0.50 (2)【選択図】図1</abstract><oa>free_for_read</oa></addata></record>
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subjects OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
title OPTICAL ISOLATOR
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