CN102025098A - Large-effective mode field area single-mode laser with exposure area in active quartz rod - Google Patents
Large-effective mode field area single-mode laser with exposure area in active quartz rod Download PDFInfo
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- CN102025098A CN102025098A CN 201010552526 CN201010552526A CN102025098A CN 102025098 A CN102025098 A CN 102025098A CN 201010552526 CN201010552526 CN 201010552526 CN 201010552526 A CN201010552526 A CN 201010552526A CN 102025098 A CN102025098 A CN 102025098A
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- quartz pushrod
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Abstract
The invention discloses a large-effective mode field area single-mode laser with an exposure area in an active quartz rod, and belongs to single-mode lasers, which solves the problem that the conventional laser cannot have single modes and high power simultaneously. The laser comprises the active quartz rod, gratings or coating films and a pumping source, wherein the active quartz rod comprises the exposure area (1), an active quartz rod core (2) and an overwrapping layer (3) sequentially from inside to outside; the exposure area (1) is positioned in the center of the active quartz rod; and the refractive indexes of the exposure area (1), the active quartz rod core (2) and the overwrapping layer (3) are decreased progressively. The gratings are written into two ends or one end of an active optical fiber, the films are coated on the other end face or at the two ends of the active optical fiber, and pumping is performed by the end face or lateral face of the pumping source. In the laser, the non-linear effect is difficult to occur, so that the total output power is increased linearly with the increase of the sectional area of the active quartz rod, and the dual increase of the quality and power of light beams is realized.
Description
Technical field
The present invention relates to a kind of large effective module field single-mode laser, be applicable to optical fiber communication, industry cutting.
Background technology
Since laser comes out, its good light characteristic has obtained approval widely, development along with technology, the power of laser is increasing, the laser of high-power special mould field is in part processing, optical communication, and the application in field such as national defence obtains people's attention day by day, its application fields makes people increasing to the input of this laser.Though the power of laser has had certain lifting, the power output of single-mode laser can't reach actual demand.The making of single mode high power laser has difficulties, and at first a reason is that the power that can bear in the laser resonant cavity unit volume is conditional, and the laser power that pump power is then exported above threshold values is difficult to continue to increase, and may reduce to some extent; Another one is the effect of nonlinear effect, and when the power of laser was higher, the effect of nonlinear effect will be very obvious, all can produce considerable influence to waveform and the power of exporting laser.Two kinds of factors all can make the beam quality rapid deterioration of laser.And if obtain single mode and beam quality laser preferably, power improves makes structure become complicated, beam quality control difficulty, inefficiency.
Summary of the invention
In order to overcome existing laser in single mode and the high-power problem that can not get both, the invention provides the long-pending single-mode laser of the large effective module scene that has the exposure area in a kind of active quartz pushrod.
Technical scheme of the present invention is:
Have the long-pending single-mode laser of large effective module scene of exposure area in a kind of active quartz pushrod, this laser comprises: active quartz pushrod, grating or plated film, pumping source.Active quartz pushrod structure is followed successively by exposure area, active quartz pushrod core and surrounding layer from inside to outside.Exposure area, active quartz pushrod core and surrounding layer, three layers refractive index is successively decreased, and the exposure area is positioned at the center of active quartz pushrod, writes grating at the two ends of exposure area or an end writes grating, other end plated film or two ends plated film.
The radius of described active quartz pushrod core is 0.5 millimeter to 500 millimeters, 62.5 microns to 10 millimeters of the thickness of surrounding layer.
The present invention compares the beneficial effect that is had with prior art:
Because it is that the active quartz pushrod of 0.5 millimeter to 500 millimeters big cross-sectional area is done the resonant cavity agent structure that the present invention adopts radius, increased the sectional area of resonant cavity, thereby reduced excellent interior maximum unit summation watt rating, reduced loss, under the situation of equal gross output, more difficult generation nonlinear effect, thus the gross power that can make output with the increase of active quartz pushrod sectional area linear increasing.Because the setting of exposure area makes whole active quartz pushrod export single-mode laser under the effect of exposure area.Really realized the double growth of beam quality and power.
Description of drawings
Fig. 1 is the long-pending single-mode laser of the large effective module scene that has the exposure area in the active quartz pushrod, and two ends all write the front view of grating.
Fig. 2 is the long-pending single-mode laser of the large effective module scene that has the exposure area in the active quartz pushrod, and two ends all write the left view of grating.
Fig. 3 is the long-pending single-mode laser of the large effective module scene that has the exposure area in the active quartz pushrod, and an end writes grating, the front view of other end plated film.
Fig. 4 is the long-pending single-mode laser of the large effective module scene that has the exposure area in the active quartz pushrod, the front view of two ends plated film.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.
Execution mode one, the large effective module scene that has the exposure area in a kind of active quartz pushrod is amassed single-mode laser, and as Fig. 1,2, this laser comprises: active quartz pushrod, grating or plated film, pumping source.Active quartz pushrod structure is followed successively by exposure area 1, active quartz pushrod core 2 and surrounding layer 3 from inside to outside.Exposure area 1 is positioned at the center of active quartz pushrod, and the refractive index that exposure area 1, active quartz pushrod core 2 and surrounding layer are 3, three layers is successively decreased.
An end of 1 writes grating 51 in the exposure area, 1 the other end writes grating 52 in the exposure area, adopts pumping source 4 to carry out end pumping.
The refractive index of exposure area 1 is 1.459, and the radius of exposure area 1 is 4 microns.
The refractive index of active quartz pushrod core 2 is 1.455, and the radius of active quartz pushrod core 2 is 5 millimeters.The refractive index of surrounding layer 3 is 1.452, and the thickness of surrounding layer 3 is 62.5 microns.
Execution mode two, the large effective module scene that has the exposure area in a kind of active quartz pushrod is amassed single-mode laser, and as Fig. 3, this laser comprises: active quartz pushrod, grating or plated film, pumping source.Active quartz pushrod structure is followed successively by exposure area 1, active quartz pushrod core 2 and surrounding layer 3 from inside to outside.Exposure area 1 is positioned at the center of active quartz pushrod, and the refractive index that exposure area 1, active quartz pushrod core 2 and surrounding layer are 3, three layers is successively decreased.
An end of 1 writes grating 51 in the exposure area, and other end plated film 52 adopts pumping source 4 to carry out profile pump.
The refractive index of exposure area 1 is 1.458, and the radius of exposure area 1 is 6 microns.
The refractive index of active quartz pushrod core 2 is 1.454, and the radius of active quartz pushrod core 2 is 50 millimeters.The refractive index of surrounding layer 3 is 1.451, and the thickness of surrounding layer 3 is 2 millimeters.
Execution mode three, the large effective module scene that has the exposure area in a kind of active quartz pushrod is amassed single-mode laser, and as Fig. 4, this laser comprises: active quartz pushrod, grating or plated film, pumping source.Active quartz pushrod structure is followed successively by exposure area 1, active quartz pushrod core 2 and surrounding layer 3 from inside to outside.Exposure area 1 is positioned at the center of active quartz pushrod, and the refractive index that exposure area 1, active quartz pushrod core 2 and surrounding layer are 3, three layers is successively decreased.
An end plated film 51 of 1, the other end plated film 52 of exposure area 1 in the exposure area adopt pumping source 4 to carry out end pumping.
The refractive index of exposure area 1 is 1.457, and the radius of exposure area 1 is 7 microns.
The refractive index of active quartz pushrod core 2 is 1.453, and the radius of active quartz pushrod core 2 is 500 millimeters.The refractive index of surrounding layer 3 is 1.450, and the thickness of surrounding layer 3 is 10 millimeters.
Active quartz pushrod described in the execution mode is mentioned in patent applied for, and its applying date is: on November 5th, 2010, and application number: 201010534431.8, denomination of invention: the quartz pushrod structure that changes refraction index profile with outer exposure method.
Quartz pushrod structure with outer exposure method change refraction index profile comprises exposure area and active quartz pushrod; The structure of active quartz pushrod is active quartz pushrod core and surrounding layer, and the exposure area is in the inside of active quartz pushrod core.
To exposing outside the exposure area, exposing light beam makes the refraction index changing of exposure area from the end of active quartz pushrod core; The refractive index of the refractive index of exposure area, active quartz pushrod core, the refractive index of surrounding layer are successively decreased successively; Wherein the ranges of indices of refraction of exposure area is 1.455～1.459, and the ranges of indices of refraction of active quartz pushrod is 1.453～1.455, and the ranges of indices of refraction of surrounding layer is 1.450～1.452.
Claims (3)
1. the long-pending single-mode laser of large effective module scene that has the exposure area in the active quartz pushrod, this laser comprises, Active Optical Fiber writes grating at the two ends of Active Optical Fiber or an end writes grating, other end plated film or two ends plated film are with pumping source end face or profile pump;
It is characterized in that: adopt active quartz pushrod to replace Active Optical Fiber, active quartz pushrod is followed successively by exposure area (1), active quartz pushrod core (2) and surrounding layer (3) from inside to outside, three layers refractive index is successively decreased, exposure area (1) is positioned at the center of active quartz pushrod, the two ends of (1) write grating or an end writes grating, other end plated film or two ends plated film in the exposure area.
2. the long-pending single-mode laser of large effective module scene that has the exposure area in a kind of active quartz pushrod according to claim 1, it is characterized in that: the radius of described active quartz pushrod core (2) is 5 millimeters to 500 millimeters, 62.5 microns to 10 millimeters of the thickness of surrounding layer (3).
3. have the long-pending single-mode laser of large effective module scene of exposure area in a kind of active quartz pushrod according to claim 1, it is characterized in that: exposure area (1) radius is 4 microns to 10 microns.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010552526 CN102025098A (en) | 2010-11-19 | 2010-11-19 | Large-effective mode field area single-mode laser with exposure area in active quartz rod |
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| CN 201010552526 CN102025098A (en) | 2010-11-19 | 2010-11-19 | Large-effective mode field area single-mode laser with exposure area in active quartz rod |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2645299Y (en) * | 2003-08-14 | 2004-09-29 | 中国科学院长春光学精密机械与物理研究所 | Large mode area double cladding optical fiber single-mode laser |
| US7450813B2 (en) * | 2006-09-20 | 2008-11-11 | Imra America, Inc. | Rare earth doped and large effective area optical fibers for fiber lasers and amplifiers |
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2010
- 2010-11-19 CN CN 201010552526 patent/CN102025098A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2645299Y (en) * | 2003-08-14 | 2004-09-29 | 中国科学院长春光学精密机械与物理研究所 | Large mode area double cladding optical fiber single-mode laser |
| US7450813B2 (en) * | 2006-09-20 | 2008-11-11 | Imra America, Inc. | Rare earth doped and large effective area optical fibers for fiber lasers and amplifiers |
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Application publication date: 20110420 |