CN1560966A - 大芯径光纤激光器 - Google Patents

大芯径光纤激光器 Download PDF

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CN1560966A
CN1560966A CNA200410016478XA CN200410016478A CN1560966A CN 1560966 A CN1560966 A CN 1560966A CN A200410016478X A CNA200410016478X A CN A200410016478XA CN 200410016478 A CN200410016478 A CN 200410016478A CN 1560966 A CN1560966 A CN 1560966A
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spherical shell
laser
diameter
pump light
optical fiber
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CN1270417C (zh
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王之江
楼祺洪
周军
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Nanjing Zhongke Shenguang Technology Co ltd
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Shanghai Institute of Optics and Fine Mechanics of CAS
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Abstract

一种大芯径光纤激光器,包括激光谐振腔和泵浦光源,其特点是它的激光谐振腔由一同心球壳形反射镜和一输出耦合镜组成,一光纤的两端面均涂有激光波长λL增透膜,其一个端面置于该同心球壳形反射镜的球心位置,另一端面与输出耦合镜紧密贴合,该同心球壳的外层涂有泵浦光波长λP增透膜,内层,在直径为d的范围内涂有激光波长λL的全反射膜,该直径为d的区域外涂有泵浦光波长λP增透膜,直径为d的面积为同心球壳形反射镜球壳面积的1-3%,输出耦合镜对激光波长λL部分反射,反射率在4%-10%之间,在同心球壳形反射镜外的中轴位置设置该泵浦光源。本发明既可以提高激光输出功率,又可在大纤芯条件下获得单模或低阶模激光输出。

Description

大芯径光纤激光器
技术领域
本发明涉及光纤激光器,特别是一种大芯径光纤激光器。
技术背景
一般的光通讯中常用的光纤,为保持其单模输出,要求纤芯小于10μm,用这种光纤制成的光纤激光器输出功率限制在百瓦量级,为进一步提高激光功率,需要加大光纤芯的直径,但加大直径会使光纤激光光束质量下降,不能在单模工作。
发明内容
本发明要解决的技术问题在于克服上述在先技术的不足,提供一种大芯径光纤激光器,以提高激光输出功率,又可以在大纤芯下获得单模或低阶模激光输出。
本发明的技术解决方案如下:
一种大芯径光纤激光器,包括激光谐振腔和泵浦光源,其特点是它的激光谐振腔由一同心球壳形反射镜和一输出耦合镜组成,一光纤的两端面均涂有激光波长λL增透膜,其一个端面置于该同心球壳形反射镜的球心位置,另一端面与输出耦合镜紧密贴合,该同心球壳的外层涂有泵浦光波长λP增透膜,内层,在直径为d的范围内涂有激光波长λL的全反射膜,该直径为d的区域外涂有泵浦光波长λP增透膜,直径为d的面积为同心球壳形反射镜球壳面积的1--3%,输出耦合镜对激光波长λL部分反射,反射率在4%-10%之间,在同心球壳形反射镜外的中轴位置设置一泵浦光源。
所述的直径为d的最佳面积为该同心球壳形反射镜球壳面积的2%。
本发明的技术效果:
本发明的大芯径光纤激光器,由于其结构使得光纤激光器内的光束被限制在θ角范围内,从而保证了单模或低阶模输出。
附图说明
图1为本发明大芯径光纤激光器的结构示意图
具体实施方式:
先请参阅图1,图1本发明大芯径光纤激光器的结构示意图,由图可见,本发明大芯径光纤激光器,它由激光谐振腔和泵浦光源组成,激光谐振腔由一同心球壳形反射镜1和一输出耦合镜4组成,一光纤2的两端面涂有激光波长λL增透膜,其一个端面置于该同心球壳形反射镜1的球心位置,另一端面与输出耦合镜4紧密贴合,该同心球壳1的外层涂有泵浦光波长λP增透膜,内层,在直径为d的范围内涂有激光波长λL的全反射膜,直径为d的区域外涂有泵浦光波长λP增透膜,直径为d的面积为同心球壳形反射镜1球壳面积的1--3%,输出耦合镜4对激光波长λL部分反射,反射率在4%-10%之间,在同心球壳形反射镜1外的中轴位置设置该泵浦光源3。
图1也是本发明大芯径光纤激光器的最佳实施例的结构示意图,其中同心球壳形反射镜1的球壳半径R=30mm,直径d为1mm,θ=0.33所述的直径为d的面积为该同心球壳形反射镜1球壳面积的2%,径实验证明,本发明可应用于光纤芯径为30μm的大芯径光纤,获得单模输出。

Claims (2)

1、一种大芯径光纤激光器,包括激光谐振腔和泵浦光源,其特征在于激光谐振腔由同心球壳形反射镜(1)和输出耦合镜(4)组成,光纤(2)的两端面涂有激光波长λL增透膜,其一个端面置于该同心球壳形反射镜(1)的球心位置,另一端面与输出耦合镜(4)紧密贴合,该同心球壳(1)的外层涂有泵浦光波长λP增透膜,内层,在直径为d的范围内涂有激光波长λL的全反射膜,直径为d的区域外涂有泵浦光波长λP增透膜,直径为d的面积是该同心球壳形反射镜(1)球壳面积的1-3%,输出耦合镜(4)对激光波长λL部分反射,反射率在4%-10%之间,在同心球壳形反射镜(1)外的中轴位置设置一泵浦光源(3)。
2、根据权利要求1所述的大芯径光纤激光器,其特征在于所述的直径为d的面积为该同心球壳形反射镜(1)球壳面积的2%。
CN 200410016478 2004-02-23 2004-02-23 大芯径光纤激光器 Expired - Lifetime CN1270417C (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100442133C (zh) * 2006-08-11 2008-12-10 中国科学院上海光学精密机械研究所 激光束模式控制装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100442133C (zh) * 2006-08-11 2008-12-10 中国科学院上海光学精密机械研究所 激光束模式控制装置

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