Methods for SRS protection of laser components and apparatus providing SRS protection
US-12142889-B2 · Nov 12, 2024 · US
Raman fiber laser employing ultra-low reflectance fiber Bragg grating
US12531385B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12531385-B2 |
| Application number | US-202217821352-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 22, 2022 |
| Priority date | Dec 30, 2021 |
| Publication date | Jan 20, 2026 |
| Grant date | Jan 20, 2026 |
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- Title
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Abstract
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A Raman fiber laser includes a pump light source, a reflective end mirror, a wavelength division multiplexer, a Raman gain fiber, and an output end mirror. The output end mirror is an ultra-low reflectance fiber Bragg grating. The reflective end mirror is connected to a reflective end of the wavelength division multiplexer. The pump light source is connected to an input end of the wavelength division multiplexer. One end of the Raman gain fiber is connected to a common end of the wavelength division multiplexer, and the other end of the Raman gain fiber is connected to the ultra-low reflectance fiber Bragg grating. The laser of the present invention can reduce loss of laser light at the reflective end mirror, thereby increasing laser light optical conversion efficiency and output power, and simultaneously achieving high time domain stability and extremely low coherence.
First claim
Opening claim text (preview).
The invention claimed is: 1 . A Raman fiber laser employing an ultra-low reflectance fiber Bragg grating, comprising: a pump light source, a reflective end mirror, a wavelength division multiplexer, a Raman gain fiber, and an output end mirror, wherein the output end mirror is an ultra-low reflectance fiber Bragg grating having a reflectance of <1%, the reflective end mirror is connected to a reflective end of the wavelength division multiplexer, the pump light source is connected to an input end of the wavelength division multiplexer, one end of the Raman gain fiber is connected to a common end of the wavelength division multiplexer, the other end of the Raman gain fiber is connected to the ultra-low reflectance fiber Bragg grating, the pump light source is a low relative intensity noise light source having a relative intensity noise of less than −100 dB/Hz, and a central wavelength of the reflective end mirror and the ultra-low reflectance fiber Bragg grating is located in an anomalous dispersion region of the Raman gain fiber. 2 . The Raman fiber laser according to claim 1 , wherein the reflective end mirror is a fiber Bragg grating having an effective reflectance of greater than 50% and lower than 90%. 3 . The Raman fiber laser according to claim 2 , wherein an end of the ultra-low reflectance fiber Bragg grating has an obliquely cut laser light output port. 4 . The Raman fiber laser according to claim 2 , wherein the pump light source outputs a pump light power of greater than 5 W.
Assignees
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Classifications
by incoherent light · CPC title
Longitudinal modes (mode suppression using a plurality of resonators H01S3/082) · CPC title
- H01S3/302Primary
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- What does patent US12531385B2 cover?
- A Raman fiber laser includes a pump light source, a reflective end mirror, a wavelength division multiplexer, a Raman gain fiber, and an output end mirror. The output end mirror is an ultra-low reflectance fiber Bragg grating. The reflective end mirror is connected to a reflective end of the wavelength division multiplexer. The pump light source is connected to an input end of the wavelength di…
- Who is the assignee on this patent?
- Univ Huazhong Science Tech
- What technology area does this patent fall under?
- Primary CPC classification H01S3/302. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jan 20 2026 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).