CN102263368A - Multi-optical fiber passive phase-locking laser - Google Patents
Multi-optical fiber passive phase-locking laser Download PDFInfo
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- CN102263368A CN102263368A CN201110177087A CN201110177087A CN102263368A CN 102263368 A CN102263368 A CN 102263368A CN 201110177087 A CN201110177087 A CN 201110177087A CN 201110177087 A CN201110177087 A CN 201110177087A CN 102263368 A CN102263368 A CN 102263368A
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Abstract
The invention discloses a multi-optical fiber passive phase-locking laser, which is suitable for the fields of industrial processing and national defense. In order to overcome the present problems of small quantity of optical paths of a passive phase-locking fiber laser, high requirements to optical fibers, and high difficulty in manufacturing many-to-many couplers, the passive phase-locking of multi-path optical fibers is realized by designing a novel coupler, so that laser output with high power and high optical beam quality is obtained. The specific implementation method comprises the steps of: connecting multi-path active monomode optical fibers by a reflection coupler (4) and a transmitting coupler (1) to realize phase locking; side-pumping first to Nth active monomode optical fibers (21, 22, ......, 2N) by using first to Nth pumping sources (51, 52,......, 5N); and shaping optical beams output by the transmitting coupler (1) by a first reflecting mirror, a second reflecting mirror and a third reflecting mirror (31, 32 and 33) to output optical beams with high quality. The laser is used for a laser energy source of a cutter in industrial processing or a laser source of a high-power laser cannon.
Description
Technical field
The present invention relates to a kind of passive phase locking laser, be applicable to that industry cutting, military affairs etc. require the field of laser output power height and good beam quality.
Background technology
Laser is just extensively paid close attention to from coming out, and the progress of superpower laser is swift and violent in recent years.At present, powerful fiber laser is widely used in the industrial circles such as accurate welding and cutting, and presents wide application prospect in military field.In recent years, the power output fast lifting of fiber laser, the method for multiple raising laser output power is suggested.
At first, attracted people's extensive concern with characteristics such as its good beam quality, conversion efficiency height and compact conformations based on the fiber laser of covering pumping technology.The single fiber power output of fiber laser in 2004 reaches a kilowatt magnitude, and IPG company reports in 2009 have been realized the single-mode laser output of single fiber myriawatt.But along with the increase of power, various nonlinear effects such as SBS, SRS and FWM make beam quality seriously reduce, and become the huge obstacle of further increase laser power.The proposition of big mode field area (LMA) optical fiber becomes a kind of feasible method, keeping under the constant situation of optical power density, increase fiber radius and can effectively increase the luminous power that optical fiber can carry, for the preparation of high power fiber laser provides necessary precondition.But because the fiber radius increasing degree is limited, excessive fiber radius makes the complexity that the mould field becomes, beam quality can not get guaranteeing, so this method problem that can solve is subjected to the restriction of fiber size.
Another kind method is MOPA (MOPA), and this method can effectively increase laser power, and exports being of high quality of laser, but is subjected to the restriction of simple optical fiber luminous power bearing capacity equally.
By contrast, a kind of more efficiently method that realizes high power laser output of Shu Chengwei of closing of multi-channel optical fibre laser.Guarantee to export the beam quality of laser when increasing power output to a certain extent, the coherent beam combination technology becomes first-selection, and coherent beam combination is divided into initiatively phase locking and passive phase locking again.Initiatively phase locking needs comparatively complicated outside phase modulation device, and less stable, by contrast, passive phase locking does not need complicated phase modifying equipment, rely on each road laser phase of the passive adjustment of equipment of laser self fully, reach the synchronous purpose of each road laser, efficient and stability are all higher.
But with regard to the implementation method of existing passive phase locking at present, can finish the light path negligible amounts of phase locking; Too high to the optical fiber structure requirement, it is polarization maintaining optical fibre that wherein a lot of implementation methods require optical fiber; Requirement has many to many fiber couplers, and such preparing fiber coupler difficulty is very big, if use the method for 2 * 2 fiber coupler cascades, the loss meeting of whole system increases along with the increase of light path quantity.
Summary of the invention
Technical problem to be solved by this invention is:
Can finish the light path negligible amounts of phase locking in the present passive phase locking laser, optical fiber structure is required height, required preparing fiber coupler difficulty is big, the loss height.
Technical scheme of the present invention is:
The passive phase locking laser of a kind of many optical fiber, this laser comprise that transmissive couplers, first to the N active monomode fiber, first speculum, second speculum, the 3rd speculum, reflector/coupler and first are to the N pumping source;
Described transmissive couplers is a rotary body, its transmission plane is perpendicular to axis, the welding anchor ring of transmissive couplers and the transmission plane of transmissive couplers are at 45, the transmission plane of transmissive couplers plates the film that is all-trans, then, on transmission plane, carve first to the M annular transmission groove that the cross section is an isosceles right triangle;
Described reflector/coupler is a rotary body, its reflecting surface is perpendicular to axis, the welding anchor ring of reflector/coupler and the reflecting surface of reflector/coupler are at 45, carve the cross section on the reflecting surface of reflector/coupler and be isosceles right triangle first to M annular reflection groove, the plating film that is all-trans on reflecting surface then;
First is the face of being all-trans to M annular reflection groove, and the degree of depth is all identical, and the spacing of adjacent annular reflection recess is identical with the width of annular reflection groove;
First to the M annular transmission depth of groove is all identical, and the spacing of adjacent annular transmission groove is identical with the width of annular transmission groove;
First to an end welding of the active monomode fiber of N on transmissive couplers welding anchor ring, be symmetrically distributed in along transmissive couplers axis axis in N/4M the cross section of axis, 4M root optical fiber in each cross section is symmetrically distributed about axis, and posetionof weld is being crossed on two crossing straight lines of cross section and transmissive couplers welding anchor ring;
First to the other end welding of the active monomode fiber of N on reflector/coupler welding anchor ring, be symmetrically distributed in along reflector/coupler axis axis in N/4M the cross section of axis, 4M root optical fiber in each cross section is symmetrically distributed about axis, and posetionof weld is being crossed on two crossing straight lines of cross section and reflector/coupler welding anchor ring;
Described first to an end of the active monomode fiber of N all with the welding of transmissive couplers welding anchor ring, the corresponding relation of annular transmission groove is on the transmission plane of posetionof weld and transmissive couplers:
The fibre core of first active monomode fiber one end is aimed at the side of the first annular transmission groove, with the first posetionof weld welding on the welding anchor ring of transmissive couplers, the fibre core of second active monomode fiber one end is aimed at the side of the first annular transmission groove, with the second posetionof weld welding on the transmissive couplers welding anchor ring, the fibre core of the 3rd active monomode fiber one end is aimed at the side of the second annular transmission groove, with the 3rd posetionof weld welding on the transmissive couplers welding anchor ring, the fibre core of having ideals, morality, culture, and discipline source monomode fiber one end is aimed at the side of the second annular transmission groove, with the 4th posetionof weld welding on the transmissive couplers welding anchor ring, the fibre core of active monomode fiber one end of 4M is aimed at the side of the first annular transmission groove, with the 4M posetionof weld welding on the transmissive couplers welding anchor ring, the fibre core of active monomode fiber one end of 4M+1 is aimed at the side of the first annular transmission groove, with the 4M+1 posetionof weld welding on the transmissive couplers welding anchor ring, the fibre core of active monomode fiber one end of 8M is aimed at the side of the first annular transmission groove, with the 8M posetionof weld welding on the transmissive couplers welding anchor ring, the fibre core of active monomode fiber one end of N-4M+1 is aimed at the side of the first annular transmission groove, with the N-4M+1 posetionof weld welding on the transmissive couplers welding anchor ring, the fibre core of active monomode fiber one end of N is aimed at the side of the first annular transmission groove, with the N posetionof weld welding on the transmissive couplers welding anchor ring;
Described first to the other end of the active monomode fiber of N all with the welding of reflector/coupler welding anchor ring, the corresponding relation of annular reflection groove is on the reflecting surface of posetionof weld and reflector/coupler:
The fibre core of the second active monomode fiber other end is aimed at the side of the first annular reflection groove, with the second posetionof weld welding on the welding anchor ring of reflector/coupler, the fibre core of the 3rd active monomode fiber other end is aimed at the side of the first annular reflection groove, with the 3rd posetionof weld welding on the reflector/coupler welding anchor ring, the fibre core of the having ideals, morality, culture, and discipline source monomode fiber other end is aimed at the side of the second annular reflection groove, with the 4th posetionof weld welding on the reflector/coupler welding anchor ring, the fibre core of the 5th active monomode fiber other end is aimed at the side of the second annular reflection groove, with the 5th posetionof weld welding on the reflector/coupler welding anchor ring, the fibre core of the active monomode fiber other end of 4M+1 is aimed at the side of the first annular reflection groove, with the 4M+1 posetionof weld welding on the reflector/coupler welding anchor ring, the fibre core of the active monomode fiber other end of 4M+2 is aimed at the side of the first annular reflection groove, with the 4M+2 posetionof weld welding on the reflector/coupler welding anchor ring, the fibre core of the active monomode fiber other end of 8M+1 is aimed at the side of the first annular reflection groove, with the 8M+1 posetionof weld welding on the reflector/coupler welding anchor ring, the fibre core of the active monomode fiber other end of N-4M+2 is aimed at the side of the first annular reflection groove, with the N-4M+2 posetionof weld welding on the reflector/coupler welding anchor ring, the fibre core of the active monomode fiber other end of N is aimed at the side of the first annular reflection groove, with the N posetionof weld welding on the reflector/coupler welding anchor ring, the fibre core of the first active monomode fiber other end is aimed at the side of the first annular reflection groove, with the first posetionof weld welding on the reflector/coupler welding anchor ring;
The even number of N=2～1008, M are integers, and M is the approximate number of N/4;
Described first to the 3rd speculum is total reflective mirror, and with the axis conllinear of transmissive couplers, described first speculum is close to the transmission plane of transmissive couplers, described second speculum places on the focal length of the 3rd speculum;
First speculum is a round platform, and the round platform cone angle is 46 °, and frustum cone side plates the film that is all-trans, second speculum is a convex mirror, and convex surface plates the film that is all-trans, and the 3rd speculum is a center concave mirror with holes, concave surface plates the film that is all-trans, and first to the 3rd speculum is made by pure quartz material.
The present invention compares the beneficial effect that is had with prior art:
The present invention does not have the requirement of polarization state to used optical fiber, and common active monomode fiber gets final product; The light path that can realize phase locking is more, the restriction on the gear shaper without theoretical; Need not common fiber coupler, adopt newly-designed coupler structure, this coupler is divided into transmissive couplers and reflector/coupler, by the annular groove that the cross section is an isosceles right triangle is set on its transmission plane or reflecting surface, can accurately control the transmission and the reflection of laser, thereby the laser in the laser in each road optical fiber and other road optical fiber is coupled, reach the purpose of control phase locking, make whole laser the output laser power for each road optical-fiber laser power with and phase place consistent, the introducing of this coupler makes laser coupled efficient higher, and loss is littler.
Description of drawings
Fig. 1 is the passive phase locking laser front view of two active monomode fibers.
Fig. 2 is the reflector/coupler front view of two active monomode fibers.
Fig. 3 is the reflector/coupler left view of two active monomode fibers.
Fig. 4 is the reflector/coupler right view of two active monomode fibers.
Fig. 5 is the front view of the transmissive couplers of two active monomode fibers.
Fig. 6 is the transmissive couplers right view of two active monomode fibers.
Fig. 7 is the transmissive couplers left view of two active monomode fibers.
Fig. 8 is the index path in first to the 3rd speculum.
Fig. 9 is the passive phase locking laser front view of four active monomode fibers.
Figure 10 is the reflector/coupler front view of four active monomode fibers.
Figure 11 is the reflector/coupler right view of four active monomode fibers.
Figure 12 is the reflector/coupler left view of four active monomode fibers.
Figure 13 is the transmissive couplers front view of four active monomode fibers.
Figure 14 is the transmissive couplers right view of four active monomode fibers.
Figure 15 is the transmissive couplers left view of four active monomode fibers.
Figure 16 is the front view in cross sections of passive phase locking laser of 1,008 active monomode fibers.
Figure 17 is the transmissive couplers right view of 1,008 active monomode fibers.
Figure 18 is the transmissive couplers left view of 1,008 active monomode fibers.
Figure 19 is the reflector/coupler left view of 1,008 active monomode fibers.
Figure 20 is the reflector/coupler right view of 1,008 active monomode fibers.
Figure 21 is the front view of circular cone quartz lens.
Figure 22 is the front view in cross section of passive phase locking laser of the active monomode fiber of N root.
Figure 23 is the transmissive couplers right view of the active monomode fiber of N root.
Figure 24 is the transmissive couplers left view of the active monomode fiber of N root.
Figure 25 is the reflector/coupler left view of the active monomode fiber of N root.
Figure 26 is the reflector/coupler right view of the active monomode fiber of N root.
Figure 27 is the passive phase locking laser front view of three active monomode fibers.
Figure 28 is the transmissive couplers right view of three active monomode fibers.
Figure 29 is the transmissive couplers left view of three active monomode fibers.
Figure 30 is the passive phase locking laser front view of cascade.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.
Execution mode one
The passive phase locking laser of a kind of many optical fiber, as Fig. 1, this laser comprises transmissive couplers 1, first, second active monomode fiber 21,22, the first speculums 31, the second speculums 32, the 3rd speculum 33, reflector/coupler 4 and first, second pumping source 51,52.
Described transmissive couplers 1 is a rotary body, as Fig. 5,6,7, make by pure quartz material, its transmission plane 12 is perpendicular to axis, the welding anchor ring 11 and transmission plane 12 angles at 45 of transmissive couplers, transmission plane 12 plates the film that is all-trans, and carves the annular transmission groove 121 that the cross section is an isosceles right triangle then on transmission plane 12.
Described reflector/coupler 4 is a rotary body, as Fig. 2,3,4, make by pure quartz material, its reflecting surface 42 is perpendicular to axis, the welding anchor ring 41 and reflecting surface 42 angles at 45 of reflector/coupler, carve the annular reflection groove 421 that the cross section is an isosceles right triangle on the reflecting surface 42, on reflecting surface 42, plate the film that is all-trans then.
One end of described first, second active monomode fiber 21,22 all with welding anchor ring 11 weldings of transmissive couplers, the corresponding relation of annular transmission groove is on the transmission plane 12 of posetionof weld and transmissive couplers:
The fibre core of first active monomode fiber 21 1 ends is aimed at the side of annular transmission groove 121, with first posetionof weld, 1121 weldings on the welding anchor ring of transmissive couplers; The fibre core of second active monomode fiber 22 1 ends is aimed at the side of annular transmission groove 121, with second posetionof weld, 1122 weldings on the welding anchor ring of transmissive couplers; First, second posetionof weld 1121,1122 on the welding anchor ring 11 of transmissive couplers lays respectively in the same plane of crossing axis of axis both sides of transmissive couplers 1, as Fig. 7.
The other end of described first, second active monomode fiber 21,22 all with welding anchor ring 41 weldings of reflector/coupler, the corresponding relation of annular reflection groove is on the reflecting surface 42 of posetionof weld and reflector/coupler:
The fibre core of first active monomode fiber 21 other ends is aimed at the side of annular reflection recess 421, with first posetionof weld, 4121 weldings on the welding anchor ring of reflector/coupler, the fibre core of second active monomode fiber 22 other ends is aimed at the side of annular reflection recess 421, with second posetionof weld, 4122 weldings on the molten welding anchor ring of reflector/coupler, first, second posetionof weld 4121,4122 on the welding anchor ring 41 of reflector/coupler lays respectively in the same plane of crossing axis of axis both sides of reflector/coupler 4, as Fig. 4.
51 pairs first active monomode fiber 21 profile pumps of first pumping source, 52 pairs second active monomode fiber 22 profile pumps of second pumping source.
Described first to the 3rd speculum 31,32,33 is total reflective mirror, the axis conllinear of its axis and transmissive couplers 1, described first speculum 31 is close to the transmission plane 11 of transmissive couplers, described second speculum 32 places on the focal length of the 3rd speculum 33, as Fig. 8;
The laser transmission path is in this laser:
Light beam in the first active monomode fiber 21 is divided into d1 light beam and d2 light beam, and the d2 beam Propagation is to annular transmission groove 121, be divided into d3 light beam and e1 light beam, the d3 light beam is back to the first active monomode fiber 21 along former road, the e1 light beam sees through annular transmission groove 121, enters first speculum 31; The d1 beam Propagation becomes the active monomode fiber 22 of c1 light beam total reflection to the second, as Fig. 5 to transmission plane 12.
Light beam in the second active monomode fiber 22 is divided into a2 light beam and a3 light beam, and the a2 beam Propagation becomes the a1 light beam and is back to the second active monomode fiber 22 along former road to annular reflection groove 421; The a3 beam Propagation becomes the active monomode fiber 21 of b1 light beam total reflection to the first, as Fig. 2 to reflecting surface 42.
The reflecting surface total reflection that the e1 light beam that enters first speculum 31 becomes e2 beam Propagation to the three speculums 33 through the offside reflection of first speculum 31 arrives second speculum 32 for the e3 light beam reflecting surface total reflection becomes output laser for the e4 light beam, as Fig. 8.
Execution mode two
The passive phase locking laser of a kind of many optical fiber, as Fig. 9, this laser comprises transmissive couplers 1, first to fourth active monomode fiber 21,22,23,24, first speculum 31, second speculum 32, the 3rd speculum 33, reflector/coupler 4 and first to fourth pumping source 51,52,53,54.
Described transmissive couplers 1 is a rotary body, as Figure 13,14,15, make by pure quartz material, its transmission plane 12 is perpendicular to axis, the welding anchor ring 11 and transmission plane 12 angles at 45 of transmissive couplers, transmission plane 12 plates the film that is all-trans, and carves the annular transmission groove 121 that the cross section is an isosceles right triangle then on transmission plane 12.
Described reflector/coupler 4 is a rotary body, as Figure 10,11,12, make by pure quartz material, its reflecting surface 42 is perpendicular to axis, the welding anchor ring 41 and reflecting surface 42 angles at 45 of reflector/coupler, carve the annular reflection groove 421 that the cross section is an isosceles right triangle on the reflecting surface 42, on reflecting surface 42, plate the film that is all-trans then.
One end of described first to fourth active monomode fiber 21,22,23,24 all with welding anchor ring 11 weldings of transmissive couplers, the corresponding relation of annular transmission groove is on the transmission plane 12 of posetionof weld and transmissive couplers 1:
The fibre core of first active monomode fiber 21 1 ends is aimed at the side of annular transmission groove 121, with first posetionof weld, 1121 weldings on the welding anchor ring of transmissive couplers, the fibre core of second active monomode fiber 22 1 ends is aimed at the side of annular transmission groove 121, with second posetionof weld, 1122 weldings on the transmissive couplers welding anchor ring, the fibre core of the 3rd active monomode fiber 23 1 ends is aimed at the side of annular transmission groove 121, with the 3rd posetionof weld 1123 weldings on the transmissive couplers welding anchor ring, the fibre core of having ideals, morality, culture, and discipline source monomode fiber 24 1 ends is aimed at the side of annular transmission groove 121, with the 4th posetionof weld 1124 weldings on the transmissive couplers welding anchor ring, on the welding anchor ring 11 of transmissive couplers first, second posetionof weld 1121,1122 lay respectively in the same plane of crossing axis of axis both sides of transmissive couplers 1, on the welding anchor ring of transmissive couplers the 3rd, the 4th posetionof weld 1123,1124 lay respectively in the same plane of crossing axis of axis both sides of transmissive couplers 1, as Figure 15.
The other end of described first to the second active monomode fiber 21,22,23,24 all with welding anchor ring 41 weldings of reflector/coupler, the corresponding relation of annular reflection groove is on the reflecting surface 42 of posetionof weld and reflector/coupler 4:
The fibre core of first active monomode fiber 21 other ends is aimed at the side of annular reflection recess 421, with first posetionof weld, 4121 weldings on the reflector/coupler welding anchor ring, the fibre core of second active monomode fiber 22 other ends is aimed at the side of annular reflection recess 421, with second posetionof weld, 4122 weldings on the reflector/coupler welding anchor ring, the fibre core of the 3rd active monomode fiber 23 other ends is aimed at the side of annular reflection recess 421, with the 3rd posetionof weld 4123 weldings on the reflector/coupler welding anchor ring, the fibre core of having ideals, morality, culture, and discipline source monomode fiber 24 other ends is aimed at the side of annular reflection recess 421, with the 4th posetionof weld 4124 weldings on the reflector/coupler welding anchor ring, on the welding anchor ring 41 of reflector/coupler first, the 4th posetionof weld 4121,4124 lay respectively in the same plane of crossing axis of axis both sides of reflector/coupler 4, on the welding anchor ring 41 of reflector/coupler second, the 3rd posetionof weld 4122,4123 lay respectively in the same plane of crossing axis of axis both sides of reflector/coupler 4, as Figure 11.
51 pairs first active monomode fiber 21 profile pumps of first pumping source, 52 pairs second active monomode fiber 22 profile pumps of second pumping source, 53 pairs the 3rd active monomode fiber 23 profile pumps of the 3rd pumping source, 54 pairs of having ideals, morality, culture, and discipline sources of the 4th pumping source monomode fiber 24 profile pumps.
Described first to the 3rd speculum 31,32,33 is total reflective mirror, and the axis conllinear of its axis and transmissive couplers 1, described first speculum 31 are close to the transmission plane 11 of transmissive couplers 1, described second speculum 32 places on the focal length of the 3rd speculum 33.
Laser transmission path at reflector/coupler 4 ends is:
Light beam in the first active monomode fiber 21, be divided into c1 light beam and c2 light beam, the c2 beam Propagation is to annular reflection groove 421, become the c3 light beam and returned first Active Optical Fiber 21 by total reflection, the c1 beam Propagation is to reflecting surface 42, become the d1 light beam active monomode fiber 22 of face 42 total reflections to the second that is reflected, as Figure 10.
Light beam in the 3rd active monomode fiber 23, be divided into a2 light beam and a3 light beam, the a2 beam Propagation is to annular reflection groove 421, become the a1 light beam and returned the 3rd Active Optical Fiber 23 by total reflection, the a3 beam Propagation is to reflecting surface 42, become b1 light beam face 42 total reflection to the having ideals, morality, culture, and discipline source monomode fibers 24 that are reflected, as Figure 10.
The laser transmission path of penetrating coupler 1 end in transmission is:
Light beam in the 3rd active monomode fiber 23, be divided into e2 light beam and e3 light beam, the e2 beam Propagation is divided into e1 light beam and f2 light beam to annular transmission groove 121, the e1 light beam is returned the 3rd active monomode fiber 23 by total reflection, and f2 sees through transmission plane 12 and transfers to first speculum 31; The e3 beam Propagation becomes the f1 light beam by the active monomode fiber 22 of total reflection to the second, as Figure 13 to transmission plane 12.
Light beam in the having ideals, morality, culture, and discipline source monomode fiber 24, be divided into g1 light beam and g2 light beam, the g2 beam Propagation is divided into g3 light beam and h2 light beam to annular transmission groove 121, the g3 light beam is returned having ideals, morality, culture, and discipline source monomode fiber 24 by total reflection, and h2 sees through transmission plane 12 and transfers to first speculum 31; G1 beam Propagation to transmission is penetrated face 12 and is become the h1 light beam by the active monomode fiber 21 of total reflection to the first, as Figure 13.
Execution mode three
The passive phase locking laser of a kind of many optical fiber, as Figure 16, this laser comprise transmissive couplers the 1, the first to the 1,008 active monomode fiber 21,22 ..., 21008, circular cone quartz lens 3, reflector/coupler 4 and the first to the 1,008 pumping source 51,52 ..., 51008.
Described transmissive couplers 1 is a rotary body, as Figure 16,17,18, make by pure quartz material, its transmission plane 12 is perpendicular to axis, the welding anchor ring 11 and transmission plane 12 angles at 45 of transmissive couplers, transmission plane 12 plates the film that is all-trans, and carving the cross section then on transmission plane 12 is first, second annular transmission groove 121,122 of isosceles right triangle.
Described reflector/coupler 4 is a rotary body, as Figure 16,19,20, make by pure quartz material, its reflecting surface 42 is perpendicular to axis, the welding anchor ring 41 and reflecting surface 42 angles at 45 of reflector/coupler, carving the cross section on the reflecting surface 42 is first, second annular reflection groove 421,422 of isosceles right triangle, plates the film that is all-trans then on reflecting surface 42.
The described the first to the 1,008 active monomode fiber 21,22 ..., an end of 21008 all with welding anchor ring 11 weldings of transmissive couplers, the corresponding relation of annular transmission groove is on the transmission plane 12 of posetionof weld and transmissive couplers 1:
The fibre core of first active monomode fiber 21 1 ends is aimed at the side of the first annular transmission groove 121, with first posetionof weld, 1121 weldings on the welding anchor ring of transmissive couplers, the fibre core of second active monomode fiber 22 1 ends is aimed at the side of the first annular transmission groove 121, with second posetionof weld, 1122 weldings on the transmissive couplers welding anchor ring, the fibre core of the 3rd active monomode fiber 23 1 ends is aimed at the side of the second annular transmission groove 122, with the 3rd posetionof weld 1123 weldings on the transmissive couplers welding anchor ring, the fibre core of having ideals, morality, culture, and discipline source monomode fiber 24 1 ends is aimed at the side of the second annular transmission groove 122, with the 4th posetionof weld 1124 weldings on the transmissive couplers welding anchor ring, the fibre core of the 8th active monomode fiber 28 1 ends is aimed at the side of the first annular transmission groove 121, with the 8th posetionof weld 1128 weldings on the transmissive couplers welding anchor ring, the fibre core of the 9th active monomode fiber 29 1 ends is aimed at the side of the first annular transmission groove 121, with the 9th posetionof weld 1129 weldings on the transmissive couplers welding anchor ring, the fibre core of the 16 active monomode fiber 216 1 ends is aimed at the side of the first annular transmission groove 121, with the 16 posetionof weld 11216 weldings on the transmissive couplers welding anchor ring, the fibre core of the 1,001 active monomode fiber 21,001 one ends is aimed at the side of the first annular transmission groove 121, with the 1,001 posetionof weld 1121001 weldings on the transmissive couplers welding anchor ring, the fibre core of the 1,008 active monomode fiber 21,008 one ends is aimed at the side of the first annular transmission groove 121, with the 1,008 posetionof weld 1121008 weldings on the transmissive couplers welding anchor ring, on the welding anchor ring 11 of transmissive couplers first, second posetionof weld 1121,1122 lay respectively in the same plane of crossing axis of axis both sides of transmissive couplers 1, on the welding anchor ring of transmissive couplers the 3rd, the 4th posetionof weld 1123,1124 lay respectively in the same plane of crossing axis of axis both sides of transmissive couplers 1, on the welding anchor ring of transmissive couplers the 1,007, the 1,008 posetionof weld 1121007,1121008 lay respectively in the same plane of crossing axis of axis both sides of transmissive couplers 1, as Figure 18.
The described the first to the 1,008 active monomode fiber 21,22 ..., 21008 the other end all with welding anchor ring 41 weldings of reflector/coupler, the corresponding relation of annular reflection groove is on the reflecting surface 42 of posetionof weld and reflector/coupler 4:
The fibre core of second active monomode fiber 22 other ends is aimed at the side of the first annular reflection groove 121, with second posetionof weld, 1122 weldings on the welding anchor ring of reflector/coupler, the fibre core of the 3rd active monomode fiber 23 other ends is aimed at the side of the first annular reflection groove 121, with the 3rd posetionof weld 1123 weldings on the reflector/coupler welding anchor ring, the fibre core of having ideals, morality, culture, and discipline source monomode fiber 24 other ends is aimed at the side of the second annular reflection groove 122, with the 4th posetionof weld 1124 weldings on the reflector/coupler welding anchor ring, the fibre core of the 5th active monomode fiber 25 other ends is aimed at the side of the second annular reflection groove 122, with the 5th posetionof weld 1125 weldings on the reflector/coupler welding anchor ring, the fibre core of the 9th active monomode fiber 29 other ends is aimed at the side of the first annular reflection groove 121, with the 9th posetionof weld 1129 weldings on the reflector/coupler welding anchor ring, the fibre core of the tenth active monomode fiber 210 other ends is aimed at the side of the first annular reflection groove 121, with the tenth posetionof weld 11210 weldings on the reflector/coupler welding anchor ring, the fibre core of the 17 active monomode fiber 217 other ends is aimed at the side of the first annular reflection groove 121, with the 17 posetionof weld 11217 weldings on the reflector/coupler welding anchor ring, the fibre core of the 1,002 active monomode fiber 21002 other ends is aimed at the side of the first annular reflection groove 121, with the 1,002 posetionof weld 1121002 weldings on the reflector/coupler welding anchor ring, the fibre core of the 1,008 active monomode fiber 21008 other ends is aimed at the side of the second annular reflection groove 122, with the 1,008 posetionof weld 1121008 weldings on the reflector/coupler welding anchor ring, the fibre core of first active monomode fiber 21 other ends is aimed at the side of the first annular reflection groove 121, with first posetionof weld, 1121 weldings on the welding anchor ring of reflector/coupler, on the welding anchor ring 41 of reflector/coupler second, the 3rd posetionof weld 1122,1123 lay respectively in the same plane of crossing axis of axis both sides of reflector/coupler 4, on the welding anchor ring of reflector/coupler the 4th, the 5th posetionof weld 1124,1125 lay respectively in the same plane of crossing axis of axis both sides of reflector/coupler 4, on the welding anchor ring of reflector/coupler the 1,008, first posetionof weld 1121008,1121 lay respectively in the same plane of crossing axis of axis both sides of reflector/coupler 1, as Figure 20.
51 pairs first active monomode fiber 21 profile pumps of first pumping source, 52 pairs second active monomode fiber 22 profile pumps of second pumping source ..., 51008 pairs the 1,008 active monomode fiber 21008 profile pumps of the 1,008 pumping source.
Described circular cone quartz lens 3 is made for quartz material, makes that the laser shaping of transmissive couplers 1 output is directional light output, index path such as Figure 21.
Execution mode four
The passive phase locking laser of a kind of many optical fiber, as Figure 22, this laser comprise transmissive couplers 1, first to the N active monomode fiber 21,22 ..., 2N, first speculum 31, second speculum 32, the 3rd speculum 33, reflector/coupler 4 and first to N pumping source 51,52 ..., 5N.
Described transmissive couplers 1 is a rotary body, as Figure 22,23,24, make by pure quartz material, its transmission plane 12 is perpendicular to axis, the welding anchor ring 11 and transmission plane 12 angles at 45 of transmissive couplers, the transmission plane 12 plating film that is all-trans, on transmission plane 12, carve the cross section then and be isosceles right triangle first to the M annular transmission groove 121,122 ..., 12M.
Described reflector/coupler 4 is a rotary body, as Figure 22,25,26, make by pure quartz material, its reflecting surface 42 is perpendicular to axis, the welding anchor ring 41 and reflecting surface 42 angles at 45 of reflector/coupler, carve the cross section on the reflecting surface 42 and be isosceles right triangle first to M annular reflection groove 421,422 ..., 42M, the plating film that is all-trans on reflecting surface 42 then.
Described first to the N active monomode fiber 21,22 ..., 2N an end all with welding anchor ring 11 weldings of transmissive couplers, the corresponding relation of annular transmission groove is on the transmission plane 12 of posetionof weld and transmissive couplers 1:
The fibre core of first active monomode fiber 21 1 ends is aimed at the side of the first annular transmission groove 121, with first posetionof weld, 1121 weldings on the welding anchor ring of transmissive couplers, the fibre core of second active monomode fiber 22 1 ends is aimed at the side of the first annular transmission groove 121, with second posetionof weld, 1122 weldings on the transmissive couplers welding anchor ring, the fibre core of the 3rd active monomode fiber 23 1 ends is aimed at the side of the second annular transmission groove 122, with the 3rd posetionof weld 1123 weldings on the transmissive couplers welding anchor ring, the fibre core of having ideals, morality, culture, and discipline source monomode fiber 24 1 ends is aimed at the side of the second annular transmission groove 122, with the 4th posetionof weld 1124 weldings on the transmissive couplers welding anchor ring, the fibre core of active monomode fiber 24M one end of 4M is aimed at the side of the first annular transmission groove 121, with the 4M posetionof weld 1124M welding on the transmissive couplers welding anchor ring, the fibre core of active monomode fiber 24,M+1 one end of 4M+1 is aimed at the side of the first annular transmission groove 121, with the 4M+1 posetionof weld 1124M+1 welding on the transmissive couplers welding anchor ring, the fibre core of active monomode fiber 28M one end of 8M is aimed at the side of the first annular transmission groove 121, with the 8M posetionof weld 1128M welding on the transmissive couplers welding anchor ring, the fibre core of active monomode fiber 2N-4M+1 one end of N-4M+1 is aimed at the side of the first annular transmission groove 121, with the N-4M+1 posetionof weld 112N-4M+1 welding on the transmissive couplers welding anchor ring, the fibre core of active monomode fiber 2N one end of N is aimed at the side of the first annular transmission groove 121, with the N posetionof weld 112N welding on the transmissive couplers welding anchor ring, on the welding anchor ring 11 of transmissive couplers first, second posetionof weld 1121,1122 lay respectively in the same plane of crossing axis of axis both sides of transmissive couplers 1, on the welding anchor ring of transmissive couplers the 3rd, the 4th posetionof weld 1123,1124 lay respectively in the same plane of crossing axis of axis both sides of transmissive couplers 1, N-1 on the welding anchor ring of transmissive couplers, N posetionof weld 112N-1,112N lays respectively in the same plane of crossing axis of axis both sides of transmissive couplers 1, as Figure 24.
Described first to the N active monomode fiber 21,22 ..., 2N the other end all with welding anchor ring 41 weldings of reflector/coupler, the corresponding relation of annular reflection groove is on the reflecting surface 42 of posetionof weld and reflector/coupler 4:
The fibre core of second active monomode fiber 22 other ends is aimed at the side of the first annular reflection groove 121, with second posetionof weld, 1122 weldings on the welding anchor ring of reflector/coupler, the fibre core of the 3rd active monomode fiber 23 other ends is aimed at the side of the first annular reflection groove 121, with the 3rd posetionof weld 1123 weldings on the reflector/coupler welding anchor ring, the fibre core of having ideals, morality, culture, and discipline source monomode fiber 24 other ends is aimed at the side of the second annular reflection groove 122, with the 4th posetionof weld 1124 weldings on the reflector/coupler welding anchor ring, the fibre core of the 5th active monomode fiber 25 other ends is aimed at the side of the second annular reflection groove 122, with the 5th posetionof weld 1125 weldings on the reflector/coupler welding anchor ring, the fibre core of the active monomode fiber 24M+1 of the 4M+1 other end is aimed at the side of the first annular reflection groove 121, with the 4M+1 posetionof weld 1124M+1 welding on the reflector/coupler welding anchor ring, the fibre core of the active monomode fiber 24M+2 of the 4M+2 other end is aimed at the side of the first annular reflection groove 121, with the 4M+2 posetionof weld 1124M+2 welding on the reflector/coupler welding anchor ring, the fibre core of the active monomode fiber 28M+1 of the 8M+1 other end is aimed at the side of the first annular reflection groove 121, with the 8M+1 posetionof weld 1128M+1 welding on the reflector/coupler welding anchor ring, the fibre core of the active monomode fiber 2N-4M+2 of the N-4M+2 other end is aimed at the side of the first annular reflection groove 121, with the N-4M+2 posetionof weld 112N-4M+2 welding on the reflector/coupler welding anchor ring, the fibre core of the active monomode fiber 2N of the N other end is aimed at the side of the second annular reflection groove 122, with the N posetionof weld 112N welding on the reflector/coupler welding anchor ring, the fibre core of first active monomode fiber 21 other ends is aimed at the side of the first annular reflection groove 121, with first posetionof weld, 1121 weldings on the welding anchor ring of reflector/coupler, on the welding anchor ring 41 of reflector/coupler second, the 3rd posetionof weld 1122,1123 lay respectively in the same plane of crossing axis of axis both sides of reflector/coupler 4, on the welding anchor ring of reflector/coupler the 4th, the 5th posetionof weld 1124,1125 lay respectively in the same plane of crossing axis of axis both sides of reflector/coupler 4, N on the welding anchor ring of reflector/coupler, the first posetionof weld 112N, 1121 lay respectively in the same plane of crossing axis of axis both sides of reflector/coupler 1, as Figure 26.
51 pairs first active monomode fiber 21 profile pumps of first pumping source, 52 pairs second active monomode fiber 22 profile pumps of second pumping source ..., N pumping source 5N is to the active monomode fiber 2N of N profile pump.
Execution mode five
The passive phase locking laser of a kind of many optical fiber, as Figure 27, the difference of this execution mode and execution mode one is: remove the reflector/coupler 4 in the execution mode one, the two ends of first, second, third active monomode fiber 21,22,23 all are connected on the welding anchor ring 11 of transmissive couplers; Carving the cross section on the transmissive couplers transmission plane 12 is first, second annular transmission groove 121,122 of isosceles right triangle; With first, second pumping source 51,52 in the face pumping light source 5 replacement execution modes one, to the first, second, third active monomode fiber distributed pumping in 21,22,23 sides.
So-called face pumping light source 5 is for the some pump mode that is different from first pumping source 51 in the execution mode one gets, and the hot spot of face pumping light source 5 is big to the side of first to the 3rd active monomode fiber 21,22,23 all can being covered; The hot spot that is with face pumping light source 5 with 5 pairs first to the 3rd distributed pumpings in active monomode fiber side of face pumping light source all covers first to the 3rd active monomode fiber 21,22,23, makes pump light enter fibre core by optical fiber side.
Owing to this execution mode is only used to transmissive couplers 1 and has been removed reflector/coupler 4 in the execution mode 1, thus unrestricted to the parity of number of fibers.
Welding anchor ring 11 weldings of described first to the 3rd active monomode fiber 21,22,23 and transmissive couplers, the corresponding relation of annular reflection groove is on the reflecting surface 12 of posetionof weld and transmissive couplers 1:
The fibre core of first active monomode fiber 21 1 ends is aimed at the side of the first annular transmission groove 121, with first posetionof weld, 1121 weldings on the welding anchor ring of transmissive couplers; The fibre core of second active monomode fiber 22 1 ends is aimed at the side of the second annular transmission groove 122, with second posetionof weld, 1122 weldings on the welding anchor ring of transmissive couplers; The fibre core of the 3rd active monomode fiber 23 1 ends is aimed at the side of the first annular transmission groove 121, with the 3rd posetionof weld 1123 weldings on the welding anchor ring of transmissive couplers;
The fibre core of the 3rd active monomode fiber 23 other ends is aimed at the side of the first annular transmission groove 121, with the 4th posetionof weld 1124 weldings on the welding anchor ring of transmissive couplers; The fibre core of first active monomode fiber 21 other ends is aimed at the side of the second annular transmission groove 122, with the 5th posetionof weld 1125 weldings on the welding anchor ring of transmissive couplers; The fibre core of second active monomode fiber 22 other ends is aimed at the side of the first annular transmission groove 121, with the 6th posetionof weld 1126 weldings on the welding anchor ring of transmissive couplers;
The first, the 4th posetionof weld 1121,1124 on the welding anchor ring 11 of transmissive couplers lays respectively in the same plane of crossing axis of axis both sides of transmissive couplers 1, the second, the 5th posetionof weld 1122,1125 on the welding anchor ring 11 of transmissive couplers lays respectively in the same plane of crossing axis of axis both sides of transmissive couplers 1, the the 3rd, the 6th posetionof weld 1123,1126 on the welding anchor ring 11 of transmissive couplers lays respectively in the same plane of crossing axis of axis both sides of transmissive couplers 1, as Figure 29.
Execution mode six
The passive phase locking laser of a kind of many optical fiber, described first to the N active monomode fiber of this laser (21,22 ..., 2N) an end all with transmissive couplers welding anchor ring (11) welding, described first to the N active monomode fiber (21,22 ..., 2N) the other end all with reflector/coupler welding anchor ring (41) welding, the structure cascade that above-mentioned connected mode constitutes is used; In the end the transmission plane place of the transmissive couplers of one-level connects speculum, and each level adopts profile pump, as Figure 30.
Claims (5)
1. the passive phase locking laser of optical fiber more than one kind is characterized in that: this laser comprise transmissive couplers (1), first to the N active monomode fiber (21,22 ..., 2N), first speculum (31), second speculum (32), the 3rd speculum (33), reflector/coupler (4) and first to the N pumping source (51,52 ..., 5N);
Described transmissive couplers (1) is a rotary body, its transmission plane is perpendicular to axis, the welding anchor ring (11) of transmissive couplers is at 45 with the transmission plane (12) of transmissive couplers, the transmission plane of transmissive couplers (12) plates the film that is all-trans, then, transmission plane (12) go up to carve first to the M annular transmission groove that the cross section is an isosceles right triangle (121,122 ... 12M);
Described reflector/coupler (4) is a rotary body, its reflecting surface is perpendicular to axis, the welding anchor ring (41) of reflector/coupler is at 45 with the reflecting surface (42) of reflector/coupler, the reflecting surface of reflector/coupler (42) go up to carve the cross section be isosceles right triangle first to M annular reflection groove (421,422 ... 42M), upward plate the film that is all-trans at reflecting surface (42) then;
First to M annular reflection groove (421,422 ... 42M) be the face of being all-trans, the degree of depth is all identical, and the spacing of adjacent annular reflection recess is identical with the width of annular reflection groove;
First to the M annular transmission groove (121,122 ... 12M) degree of depth is all identical, and the spacing of adjacent annular transmission groove is identical with the width of annular transmission groove;
First to the N active monomode fiber (21,22 ..., 2N) an end welding on transmissive couplers welding anchor ring (11), be symmetrically distributed in along transmissive couplers axis axis in N/4M the cross section of axis, 4M root optical fiber in each cross section is symmetrically distributed about axis, and posetionof weld is being crossed on two crossing straight lines of cross section and transmissive couplers welding anchor ring (11);
First to the N active monomode fiber (21,22 ..., 2N) other end welding on reflector/coupler welding anchor ring (41), be symmetrically distributed in along reflector/coupler axis axis in N/4M the cross section of axis, 4M root optical fiber in each cross section is symmetrically distributed about axis, and posetionof weld is being crossed on two crossing straight lines of cross section and reflector/coupler welding anchor ring (41);
Described first to the N active monomode fiber (21,22 ..., 2N) an end all with transmissive couplers welding anchor ring (11) welding, the corresponding relation that the transmission plane of posetionof weld and transmissive couplers (12) is gone up annular transmission groove is:
The fibre core of first active monomode fiber (21) one ends is aimed at the side of the first annular transmission groove (121), with first posetionof weld (1121) welding on the welding anchor ring of transmissive couplers, the fibre core of second active monomode fiber (22) one ends is aimed at the side of the first annular transmission groove (121), with second posetionof weld (1122) welding on the transmissive couplers welding anchor ring, the fibre core of the 3rd active monomode fiber (23) one ends is aimed at the side of the second annular transmission groove (122), with the 3rd posetionof weld (1123) welding on the transmissive couplers welding anchor ring, the fibre core of having ideals, morality, culture, and discipline source monomode fiber (24) one ends is aimed at the side of the second annular transmission groove (122), with the 4th posetionof weld (1124) welding on the transmissive couplers welding anchor ring, the fibre core of the active monomode fiber of 4M (24M) end is aimed at the side of the first annular transmission groove (121), with 4M posetionof weld (1124M) welding on the transmissive couplers welding anchor ring, the fibre core of the active monomode fiber of 4M+1 (24M+1) end is aimed at the side of the first annular transmission groove (121), with 4M+1 posetionof weld (1124M+1) welding on the transmissive couplers welding anchor ring, the fibre core of the active monomode fiber of 8M (28M) end is aimed at the side of the first annular transmission groove (121), with 8M posetionof weld (1128M) welding on the transmissive couplers welding anchor ring, the fibre core of the active monomode fiber of N-4M+1 (2N-4M+1) end is aimed at the side of the first annular transmission groove (121), with N-4M+1 posetionof weld (112N-4M+1) welding on the transmissive couplers welding anchor ring, the fibre core of the active monomode fiber of N (2N) end is aimed at the side of the first annular transmission groove (121), with N posetionof weld (112N) welding on the transmissive couplers welding anchor ring;
Described first to the N active monomode fiber (21,22 ..., 2N) the other end all with reflector/coupler welding anchor ring (41) welding, the corresponding relation that the reflecting surface of posetionof weld and reflector/coupler (42) is gone up the annular reflection groove is:
The fibre core of second active monomode fiber (22) other end is aimed at the side of the first annular reflection groove (421), with second posetionof weld (412) welding on the welding anchor ring of reflector/coupler, the fibre core of the 3rd active monomode fiber (23) other end is aimed at the side of the first annular reflection groove (421), with the 3rd posetionof weld (4123) welding on the reflector/coupler welding anchor ring, the fibre core of having ideals, morality, culture, and discipline source monomode fiber (24) other end is aimed at the side of the second annular reflection groove (422), with the 4th posetionof weld (4124) welding on the reflector/coupler welding anchor ring, the fibre core of the 5th active monomode fiber (25) other end is aimed at the side of the second annular reflection groove (422), with the 5th posetionof weld (4125) welding on the reflector/coupler welding anchor ring, the fibre core of the active monomode fiber of 4M+1 (24M+1) other end is aimed at the side of the first annular reflection groove (421), with 4M+1 posetionof weld (4124M+1) welding on the reflector/coupler welding anchor ring, the fibre core of the active monomode fiber of 4M+2 (24M+2) other end is aimed at the side of the first annular reflection groove (421), with 4M+2 posetionof weld (4124M+2) welding on the reflector/coupler welding anchor ring, the fibre core of the active monomode fiber of 8M+1 (28M+1) other end is aimed at the side of the first annular reflection groove (421), with 8M+1 posetionof weld (4128M+1) welding on the reflector/coupler welding anchor ring, the fibre core of the active monomode fiber of N-4M+2 (2N-4M+2) other end is aimed at the side of the first annular reflection groove (421), with N-4M+2 posetionof weld (412N-4M+2) welding on the reflector/coupler welding anchor ring, the fibre core of the active monomode fiber of N (2N) other end is aimed at the side of the first annular reflection groove (421), with N posetionof weld (412N) welding on the reflector/coupler welding anchor ring, the fibre core of first active monomode fiber (21) other end is aimed at the side of the first annular reflection groove (421), with first posetionof weld (4121) welding on the reflector/coupler welding anchor ring;
The even number of N=2～1008, M are integers, and M is the approximate number of N/4;
Described first to the 3rd speculum (31,32,33) is total reflective mirror, and with the axis conllinear of transmissive couplers (1), transmission plane (11), described second speculum (32) that described first speculum (31) is close to transmissive couplers (1) place on the focal length of the 3rd speculum (33);
First speculum (31) is a round platform, the round platform cone angle is 46 °, frustum cone side plates the film that is all-trans, second speculum (32) is a convex mirror, convex surface plates the film that is all-trans, the 3rd speculum (33) is a center concave mirror with holes, and concave surface plates the film that is all-trans, and first to the 3rd speculum (31,32,33) is made by pure quartz material.
2. the passive phase locking laser of a kind of many optical fiber according to claim 1 is characterized in that:
Described first to the 3rd speculum (31,32,33) replaces realizing beam shaping with circular cone quartz lens (3).
3. the passive phase locking laser of a kind of many optical fiber according to claim 1 is characterized in that:
With two active monomode fiber weldings of adjacent numbering is one, and its two ends all are connected on the welding anchor ring (11) of transmissive couplers.
4. the passive phase locking laser of a kind of many optical fiber according to claim 1 is characterized in that:
With face pumping light source (5) replace described first to the N pumping source (51,52 ..., 5N) to described first to the N active monomode fiber (21,22 ..., 2N) carry out cloth formula profile pump.
5. the passive phase locking laser of a kind of many optical fiber according to claim 1 is characterized in that:
Described first to the N active monomode fiber (21,22 ..., 2N) an end all with transmissive couplers welding anchor ring (11) welding, described first to the N active monomode fiber (21,22 ..., 2N) the other end all with reflector/coupler welding anchor ring (41) welding, the structure cascade that above-mentioned connected mode constitutes is used; In the end the transmission plane place of the transmissive couplers of one-level connects speculum, and each level adopts profile pump.
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Application publication date: 20111130 |