CN101272030A - Tunable microchip laser - Google Patents
Tunable microchip laser Download PDFInfo
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- CN101272030A CN101272030A CNA2008100710147A CN200810071014A CN101272030A CN 101272030 A CN101272030 A CN 101272030A CN A2008100710147 A CNA2008100710147 A CN A2008100710147A CN 200810071014 A CN200810071014 A CN 200810071014A CN 101272030 A CN101272030 A CN 101272030A
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- birefringece crystal
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Abstract
The invention discloses a tunable micro-disk laser, which comprises a pumping source, an optically coupled system of a pump light and a micro-disk laser and is characterized in that the micro-disk laser comprises a laser gain medium, a birefringent crystal wave plate with a tiny wedge angle and a polarizer; the birefringent crystal wave plate with the tiny wedge angle and the polarizer constitute a wavelength choice structure. The oscillating tuning of the laser wavelength is realized by parallelly and vertically moving the position of pumping point which is at the direction of pump light. By adopting the technical scheme, the tunable micro-disk laser is small in volume, simple to adjust, low in cost and easier to realize scale production, which promotes the adjustable laser to be widely applied.
Description
Technical field
The present invention relates to laser field, relate in particular to a kind of tunable microchip laser that adopts semiconductor laser or other laser end face pumpings.
Background technology
Tunable laser has been widely used in different field, it adopts etalon, birefringece crystal Loyt filter plate, tunable gratings etc. to choose wavelength usually, realize the laser output wavelength power-adjustable, but present most of tunable laser adopts the disengagement chamber mode, its complex structure, volume are bigger, the application experiment room environmental is difficult to large-scale batch production and obtains broader applications mostly.
Summary of the invention
The object of the invention provides a kind of simple in structure, tunable microchip laser that volume is little.
The present invention is by the following technical solutions: micro-slice laser comprises pumping source, pump light optical coupling system and micro-slice laser, wherein micro-slice laser comprise gain medium, with the birefringece crystal wave plate and the polarizer of small (0 °～1 °) angle of wedge, the birefringece crystal wave plate and the polarizer with the small angle of wedge constitute the wavelength choice structure, by the pumping point position of vertical translation pump direction, realize that the optical maser wavelength vibration is tuning.
When above-mentioned gain medium broader bandwidth, adopt the birefringece crystal of two light shaft positive cross to form composite wave plate with the birefringece crystal wave plate of the small angle of wedge.
In order to press narrow laser linewidth, birefringece crystal wave plate and one group of polarizer with the small angle of wedge that the above-mentioned birefringece crystal wave plate with the small angle of wedge adopts the one group of thickness and the angle of wedge to differ the same integer multiple constitute wavelength selector, one group is more than two, polarizer quantity is lacked a slice than crystal wavelength, and with the birefringece crystal wave plate and the polarizer placed adjacent of the small angle of wedge.
The above-mentioned polarizer is that PBS prism, polarization absorption sheet polarizer, a slice birefringece crystal angle of wedge sheet, a slice above birefringece crystal angle of wedge group or birefringece crystal and uniform optical material are formed angle of wedge group, makes the O light of generation and E light form angle.
The pumping point methods of above-mentioned vertical translation pump direction is the pumping point of vertical translation pump light optical coupling system output directly.
The pumping point methods of above-mentioned vertical translation pump direction is mobile vertical translation micro-slice laser.
Above-mentioned pumping source adopts semiconductor laser or pump laser.
The present invention adopts above technical scheme, as shown in Figure 1, utilizes the birefringece crystal wave plate characteristic of the small angle of wedge, if light is Lo by A place, birefringece crystal wave plate center thickness, by B place thickness is L, and its A place moves vertically to B place distance and is X, and birefringece crystal angle of wedge degree is θ (0 °～1 °).
Then light is by the O of A place, and the phasic difference of e light relative wavelength λ is:
In the phasic difference of B place be:
Because θ (0 °～1 °) is very little, as 2 ", 10 ", 20 " etc. low-angle, above-mentioned formula can change into:
To the Loyt filter, only this angle of wedge sheet wavelength light that is its half-wave plate or full-wave plate could starting of oscillation, that is:
Wherein M is required to be integer.
By the pumping point position of vertical translation pump direction, change X, make the full-wave plate that sees through wavelength with the birefringece crystal wave plate conduct of little angle of wedge, realize different optical maser wavelengths vibrations.Pump light forms thermal lens in gain medium, make whole laser cavity equivalence flat-concave cavity, constitutes steady cavity configuration, and move on gain medium with pumping point in so steady chamber, and minor variations is given birth in steady chamber only chamber long hair, thereby can realize that laser oscillation wavelength is tuning.Adopt microchip can adjust laser, its volume is little, adjusting is simple, cost is low, more easily realizes large-scale production, and this propelling can be adjusted laser and obtain extensive use.
Description of drawings
Now in conjunction with the accompanying drawings the present invention is further elaborated:
Fig. 1 is the asynchronous schematic diagram in pumping point position of the birefringece crystal wave plate of the little angle of wedge of band of the present invention;
Fig. 2 is the structural representation of one of pumping point methods of micro-slice laser vertical translation pump direction of the present invention;
Fig. 3 is two a structural representation of the pumping point methods of micro-slice laser vertical translation pump direction of the present invention;
Fig. 4 is the structural representation that the polarizer of the present invention adopts one of angle of wedge group;
Fig. 5 is two the structural representation that the polarizer of the present invention adopts angle of wedge group;
Fig. 6 is three the structural representation that the polarizer of the present invention adopts angle of wedge group;
Fig. 7 is the structural representation that the polarizer of the present invention adopts one of angle of wedge;
Fig. 8 is four the structural representation that the polarizer of the present invention adopts angle of wedge group;
Fig. 9 is two the structural representation that the polarizer of the present invention adopts the angle of wedge;
Figure 10 is the another kind of structural representation of the birefringece crystal wave plate of the little angle of wedge of band of the present invention;
Figure 11 is that wavelength choice structure of the present invention is the structural representation of multistage micro-slice laser.
Embodiment
See also shown in Fig. 2 or 3, the present invention includes pumping source 1, pump light optical coupling system 2 and micro-slice laser 3, pumping source 1 adopts semiconductor laser or pump laser.Wherein micro-slice laser 3 comprises gain medium 31, the birefringece crystal wave plate 32 and the polarizer 33 with the small angle of wedge (0 °～1 °), the polarizer 33 is the PBS prism, polarization absorption sheet polarizer, a slice birefringece crystal angle of wedge sheet, a slice above birefringece crystal angle of wedge group or birefringece crystal and uniform optical material are formed angle of wedge group, its effect is that its a slice birefringece crystal optical axis is that e (or o light) produces vibration relatively, because o light is different with the e optical index, make the O light and the E light of generation form angle, o (or e) light then departs from laser cavity and shakes direction and can not form laser generation, thereby forms single polarization direction selector.Birefringece crystal wave plate 32 with the small angle of wedge constitutes the wavelength choice structures with the polarizer 33, when being 45 ° or non-90 ° of angles with the optical axis of the birefringece crystal wave plate 32 of the small angle of wedge and the polarizer 33 by direction of polarized light, promptly forms optics Loyt filter.Each element all adopts optical cement or deepens optical cement glued together in the micro-slice laser 3.Micro-slice laser 3 can glue together other optical element such as gain medium plain film or polarizing component, according to the correction of the birefringent wave plate angle of wedge, whole microplate chamber is compensated for as average chamber.So, can realize that the optical maser wavelength vibration is tuning by the pumping point position of vertical translation pump direction.The pumping point methods of vertical translation pump direction is the pumping point or the mobile vertical translation micro-slice laser of the output of vertical translation pump light optical coupling system directly.
Shown in Fig. 4-9, the polarizer 33 has a slice birefringece crystal angle of wedge sheet or angle of wedge sheet group at least as playing effect partially, forms angle of wedge group as a slice birefringece crystal angle of wedge sheet, a slice above birefringece crystal angle of wedge group or birefringece crystal and uniform optical material.
See also again shown in Figure 10, when gain medium 31 broader bandwidth, Δ n=n
o-n
eBigger, then need birefringece crystal wave plate 32 thinner thicknesses with the small angle of wedge, can adopt the birefringece crystal formation composite wave plate thickness difference of two light shaft positive cross to realize.
See also shown in Figure 11ly again, the wavelength choice structure free spectral range of birefringence filtering is big, but fineness is very little, generally only is F=2, and single-stage birefringence filter is difficult to obtain narrow laser linewidth.In order to press narrow laser linewidth, birefringece crystal wave plate 32 and one group of polarizer 33 with the small angle of wedge that can adopt the one group of thickness and the angle of wedge to differ the same integer multiple constitute wavelength selector, one group is more than two, the wavelength choice structure of the combined birefringence filter that forms, usually by 3 or 4 birefringece crystal wave plate 32 combinations with the small angle of wedge, birefringece crystal wave plate 32 thickness of getting usually with the small angle of wedge as 3 chips are 1: 2: 6; 1: 2: 9 or 1: 4: 16, its angle of wedge differs the same integer multiple, the polarizer 33 quantity are lacked a slice than the birefringece crystal wave plate 32 with the small angle of wedge simultaneously, and with the birefringece crystal wave plate 32 and the polarizer 33 placed adjacent of the small angle of wedge, this birefringece crystal wave plate 32 with the small angle of wedge between the polarizer 33 only just rises for full-wave plate partially.
Claims (7)
1, a kind of tunable microchip laser, comprise pumping source, pump light optical coupling system and micro-slice laser, it is characterized in that: micro-slice laser comprises gain medium, with the birefringence bulk wave sheet and the polarizer of the small angle of wedge (0 °～1 °), the birefringece crystal wave plate and the polarizer with the small angle of wedge constitute the wavelength choice structure, by the pumping point position of vertical translation pump direction, realize that the optical maser wavelength vibration is tuning.
2, a kind of tunable microchip laser according to claim 1 is characterized in that: when the gain medium broader bandwidth, adopt the birefringece crystal formation composite wave plate of two light shaft positive cross with the birefringece crystal wave plate of the small angle of wedge.
3, a kind of tunable microchip laser according to claim 1, it is characterized in that: in order to press narrow laser linewidth, birefringece crystal wave plate and one group of polarizer with the small angle of wedge that its birefringece crystal wave plate with the small angle of wedge adopts the one group of thickness and the angle of wedge to differ the same integer multiple constitute wavelength selector, one group is more than two, polarizer quantity is lacked a slice than crystal wavelength, and with the birefringece crystal wave plate and the polarizer placed adjacent of the small angle of wedge.
4, according to claim 1 or 3 described a kind of tunable microchip lasers, it is characterized in that: its polarizer is that PBS prism, polarization absorption sheet polarizer, a slice birefringece crystal angle of wedge sheet, a slice above birefringece crystal angle of wedge group or birefringece crystal and uniform optical material are formed angle of wedge group, makes the O light of generation and E light form angle.
5, a kind of tunable microchip laser according to claim 1 is characterized in that: the pumping point methods of its vertical translation pump direction is the pumping point of vertical translation pump light optical coupling system output directly.
6, a kind of tunable microchip laser according to claim 1 is characterized in that: the pumping point methods of its vertical translation pump direction is mobile vertical translation micro-slice laser.
7, a kind of tunable microchip laser according to claim 1 is characterized in that: its pumping source adopts semiconductor laser or pump laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100710147A CN101272030A (en) | 2008-05-08 | 2008-05-08 | Tunable microchip laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100710147A CN101272030A (en) | 2008-05-08 | 2008-05-08 | Tunable microchip laser |
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| CN101272030A true CN101272030A (en) | 2008-09-24 |
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| CNA2008100710147A Pending CN101272030A (en) | 2008-05-08 | 2008-05-08 | Tunable microchip laser |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103117506A (en) * | 2013-03-07 | 2013-05-22 | 中国科学院半导体研究所 | Filtering type wavelength tunable external cavity laser |
| WO2017102520A1 (en) * | 2015-12-18 | 2017-06-22 | Rofin Sinar Laser Gmbh | Laser device with an optical resonator and method for adjusting the laser device |
-
2008
- 2008-05-08 CN CNA2008100710147A patent/CN101272030A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103117506A (en) * | 2013-03-07 | 2013-05-22 | 中国科学院半导体研究所 | Filtering type wavelength tunable external cavity laser |
| CN103117506B (en) * | 2013-03-07 | 2015-04-15 | 中国科学院半导体研究所 | Filtering type wavelength tunable external cavity laser |
| WO2017102520A1 (en) * | 2015-12-18 | 2017-06-22 | Rofin Sinar Laser Gmbh | Laser device with an optical resonator and method for adjusting the laser device |
| US20190006811A1 (en) * | 2015-12-18 | 2019-01-03 | Rofin Sinar Laser Gmbh | Laser device with an optical resonator and method for adjusting the laser device |
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Open date: 20080924 |