High power optical apparatus employing large-mode-area, multimode, gain-producing optical fibers

OPT OpenIR > 半导体激光器专利数据库

	High power optical apparatus employing large-mode-area, multimode, gain-producing optical fibers
其他题名	High power optical apparatus employing large-mode-area, multimode, gain-producing optical fibers
	HEADLEY, CLIFFORD; DIGIOVANNI, DAVID J.
	2008-07-30
专利权人	OFS FITEL, LLC
公开日期	2008-07-30
授权国家	欧洲专利局
专利类型	发明申请
摘要	Optical apparatus includes a multimode, gain-producing fiber (12) for providing gain to signal light propagating in the core of the fiber, and a pump source for providing pump light that is absorbed in the core, characterized in that (i) the pump source illustratively comprises a low brightness array of laser diodes and a converter for increasing the brightness of the pump light, (ii) the pump light is coupled directly into the core, and (iii) the area of the core exceeds approximately 350 µm2. In one embodiment, the signal light propagates in a single mode, and the pump light co-propagates in at least the same, single mode, both in a standard input fiber (22) before entering the gain-producing fiber, and a mode expander (20) is disposed between the input fiber and the gain-producing fiber. In another embodiment, multiple pumps are coupled into the core of the gain-producing fiber. The pumps may generate light of the same wavelength or of different wavelengths. In accordance with a particular embodiment of our invention, we have demonstrated amplification of nanosecond optical pulses at 1545 nm in a single clad Er-doped fiber having a core area of 875 um2; the core was pumped by a high brightness Raman laser at 1480 nm; and the pulses had a record peak power of several hundred kW.
其他摘要	光学设备包括：多模产生增益的光纤（12），用于为在光纤芯中传播的信号光提供增益;以及泵浦源，用于提供在芯中吸收的泵浦光，其特征在于：（i）泵源说明性地包括低亮度激光二极管阵列和用于增加泵浦光亮度的转换器，（ii）泵浦光直接耦合到核心中，以及（iii）核心区域超过约350μm2。在一个实施例中，信号光以单一模式传播，并且泵浦光在至少相同的单模式下共同传播，在进入增益产生光纤之前在标准输入光纤（22）和模式扩展器中共同传播（20）设置在输入光纤和增益产生光纤之间。在另一个实施例中，多个泵耦合到产生增益的光纤的纤芯中。泵可以产生相同波长或不同波长的光。根据本发明的一个特定实施例，我们已经证明在核心面积为875μm2的单包层掺铒光纤中在1545nm处放大纳秒光脉冲;核心由1480nm的高亮度拉曼激光器泵浦;并且脉冲具有几百kW的记录峰值功率。
主权项	High power optical fiber apparatus comprising: an input fiber having a first core region configured to propagate signal light in a single transverse mode and pump light in at least the same, single transverse mode, a high brightness source of said pump light, a multimode, gain-producing optical fiber having a second core region and a cladding region surrounding said second core region, the cross-sectional area of said second core region exceeding approximately 350 µm 2 and exceeding the cross-sectional area of said first core region, said second core region configured to provide gain to said signal light propagating therein when said pump light is absorbed therein, and a mode expander for coupling said signal light and said pump light from said first core region into said second core region and for altering the mode field areas of said signal light and said pump light in said input fiber to match the corresponding mode field areas in said second core region.
申请日期	2008-01-23
专利号	EP1950852A2
专利状态	失效
申请号	EP2008001212
公开（公告）号	EP1950852A2
IPC 分类号	H01S3/067 \| G02B6/26 \| G02B6/32 \| H01S3/094
专利代理人	-
代理机构	SCHOPPE, FRITZ
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/53996
专题	半导体激光器专利数据库
作者单位	OFS FITEL, LLC
推荐引用方式 GB/T 7714	HEADLEY, CLIFFORD,DIGIOVANNI, DAVID J.. High power optical apparatus employing large-mode-area, multimode, gain-producing optical fibers. EP1950852A2[P]. 2008-07-30.

条目包含的文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
EP1950852A2.PDF（378KB）	专利		开放获取	CC BY-NC-SA	请求全文