CN204858259U - Full fiber laser pilot light device of high power - Google Patents

Abstract

The utility model provides a full fiber laser pilot light device of high power, this scheme including the pilot light laser instrument of tail optical fiber output, close and restraint ware, high power circulator, laser instrument system and quartz capsule, the high power circulator is port1, port2 and port3 respectively including three port, port, the tail optical fiber output and the port1 port of pilot light laser instrument are connected, it is connected with the port2 port to close the signal input part who restraints the ware, adapt to the intraductal no core fibre that is provided with, no core fibre is connected with the port3 port, close the output and laser instrument headtotail of restrainting the ware. When the pilot light can be injected into to this scheme in full optical fiber link, efficient handling fell optical fiber link's reverse signal light, and the safety of guarantee instruction laser instrument provides the technological means for all optical fibre structure high -power laser's through engineering approaches.

Description

A kind of high-power all-fiber laser pilot light device

Technical field

The utility model relates to field of laser device technology, especially a kind of high-power all-fiber laser pilot light device.

Background technology

Adding for full-optical-fiber laser important role of coaxial pilot light.First, coaxial pilot light often adopts the visible ray such as ruddiness or green glow, for non-visible light laser, be convenient to the adjustment of its subsequent optical path, and pilot light power is lower, greatly reduces risk during superpower laser optical path adjusting.Moreover, for full-optical-fiber laser, use coaxial pilot light, the optical fiber of inspection department's whole section of light path fast can there be open circuit, damage in which place, facilitate the maintenance of laser.

Coaxial pilot light to be added at full-optical-fiber laser, its needs inject pilot light in the top of optical fiber link, but high-power all-fiber laser is higher in the reverse signal luminous power at top, if directly pilot light laser is fused into top, pilot light laser can directly break by reverse signal light.For this reason, the main points adding the coaxial pilot light of high-power all-fiber laser dispose the reverse signal light at top while being to ensure pilot light fl transmission.Chinese patent " a kind of pilot light generating means of fiber laser " (patent No. CN104216197A), mainly through beam shaping telescope, pilot light Space Coupling is entered output optical fibre, although theory structure is simple, exists and regulate difficulty, the problem that stability is not good.United States Patent (USP) " Precisionlight-guidingterminalforopticalfibers " (patent No. US5479543) its adopt the form of coupling head in the bonding of optical fiber top, coupling head surface is in shapes such as ellipses, make pilot light while coupled into optical fibres, ensure that the stability of space structure, but for high-capacity optical fiber laser, this structure can not tolerate the reverse signal light of higher-wattage, so structure is not suitable for using in high-capacity optical fiber laser.

Utility model content

The purpose of this utility model, be exactly for the deficiency existing for prior art, and a kind of technical scheme of high-power all-fiber laser pilot light device is provided, while the program can inject pilot light in all-fiber link, effectively dispose the reverse signal light of optical fiber link, ensure the safety of indication laser, for the through engineering approaches of all optical fibre structure superpower laser provides technological means.

This programme is achieved by the following technical measures: a kind of high-power all-fiber laser pilot light device, is characterized in that: include pilot light laser, bundling device, high power annular equipment, Optical Maser System and quartz ampoule that tail optical fiber exports; High power annular equipment includes three ports, and port is respectively port1, port2 and port3; The tail optical fiber output of pilot light laser is connected with port1 port; The signal input part of bundling device is connected with port2 port; Adapt to be provided with coreless fiber in pipe; Coreless fiber is connected with port3 port; The output of bundling device is connected with Optical Maser System; Coreless fiber is by being mixed with Al ₂o ₃the low-refraction glue curing of powder is in quartz ampoule.

Preferred as this programme: the length of coreless fiber is greater than D × n _quartz/ 2NA, wherein D is coreless fiber diameter, and NA is circulator Port3 fiber numerical aperture, n _quartzfor quartzy refractive index.

Preferred as this programme: corrosion treatment is carried out on the surface of coreless fiber.

Preferred as this programme: the tolerance power of high power annular equipment is greater than the reverse signal luminous power of Optical Maser System.

The beneficial effect of this programme can be learnt according to describing of such scheme, because high power annular equipment is connected with pilot light laser, Optical Maser System link and coreless fiber respectively in this scenario, visible pilot light is imported port2 from port1 by high power annular equipment, thus is imported in Optical Maser System link by pilot light.Meanwhile, the reverse signal light of Optical Maser System is imported to port3 from port2 by superpower laser, imports to coreless fiber by reverse signal light, prevents pilot light laser to break.Further, for the reverse signal light imported in coreless fiber, first by coreless fiber, reverse signal light is expanded, reduces its power density, then by coreless fiber surface corrosion layer be filled with Al ₂o ₃the colloid of powder, derives the homogenize from coreless fiber of reverse signal light thus does not produce obvious focus, the reverse signal light of higher-wattage is effectively addressed, ensures the safety and stability of whole laser link.

As can be seen here, the utility model compared with prior art, has substantive distinguishing features and progress, and its beneficial effect implemented also is apparent.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model.

In figure, 1 is pilot light laser, and 2 is port1 port, and 3 is high power annular equipment, and 4 is port2 port, and 5 is port3 port, and 6 is quartz ampoule, and 7 is coreless fiber, and 8 is bundling device, and 9 is Optical Maser System, and 10 is visible pilot light, and 11 is reverse signal light.

Embodiment

All features disclosed in this specification, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.

Arbitrary feature disclosed in this specification (comprising any accessory claim, summary and accompanying drawing), unless specifically stated otherwise, all can be replaced by other equivalences or the alternative features with similar object.That is, unless specifically stated otherwise, each feature is an example in a series of equivalence or similar characteristics.

As Fig. 1

The pilot light laser that the utility model relates to is placed on the top of whole laser link, simultaneously owing to requiring that pilot light follows laser signal to be coaxial, therefore for common MOPA structure full-optical-fiber laser, input signal end and the welding of pilot light output phase of usual use (N+1) × 1 bundling device, make pilot light enter smoothly in whole laser signal link.Preferably, pilot light generator usually selects visible red optical band (λ=635nm) tail optical fiber to export single mode semiconductor laser, and it has volume compact and the high advantage of visible brightness, can ensure the all-fiber of whole pilot light device simultaneously.

Simultaneously, because the reverse signal luminous power of follow-up superpower laser is higher, if directly by pilot light laser and the welding of bundling device input phase, it is inner that stronger reverse signal light can directly inject pilot light laser, broken by pilot light laser internal illumination unit.For this reason, between pilot light laser and bundling device and post laser link input, high-power fiber circulator is added.By the tail optical fiber phase welding of the Port1 port of high power annular equipment with pilot light laser, and Port2 port and bundling device and the welding of post laser link input phase, Port3 port and the welding of one section of coreless fiber phase.The operation principle of high power annular equipment is that the pilot light from Port1 port can be transferred to Port2 port by it; reverse laser signal from Port2 port is imported to Port3 port simultaneously; thus play and can conduct instruction laser; the object that reverse signal light enters pilot light laser can be completely cut off again, to protect pilot light device safe and reliable.

In order to safe handling falls to import to the reverse laser signal of higher-wattage of Port3 port, one section is used to peel off the coreless fiber of coat and the welding of Port3 fiber port phase, make reverse laser signal after coreless fiber transmission, fully expanded, thus reduce the power density of reverse signal light.Preferably, in order to make reverse signal luminous energy fully be expanded, it is fiber cladding diameter that suggestion coreless fiber length is greater than D × n quartz/2NA(D, and NA is the numerical aperture of reverse signal light, n quartz is quartzy refractive index), such reverse signal light can get to the cladding surface of coreless fiber.Further, preferably, in order to allow the reverse signal luminous energy getting to coreless fiber cladding surface comparatively evenly be derived, coreless fiber cladding surface being done texturing corrosion, making reverse signal light, on texturing surface, scattering occur, thus reducing its power density further.Centreless bare fiber after corroding to protect texturing, use quartz ampoule (groove) by this portion envelops, and filling is mixed with Al ₂o ₃the low-refraction glue of powder, is solidified, thus the final reverse signal of derivation safely light.

In practical process, should be noted that some:

1. consider from the practicality of pilot light laser, usually select the sensitive visible red of human eye or green glow.From brightness and security consideration, its power is about mW to hundred mW magnitudes.From the viewpoint of all-fiber, the densification of system, tail optical fiber should be selected to export single mode semiconductor laser.

2. the reverse signal luminous power due to full-optical-fiber laser is higher, therefore tolerance power should be selected to be greater than the high power annular equipment of reverse signal luminous power.For high-power all-fiber laser, circulator should select hundred mW to the product of watt magnitude.Meanwhile, in order to reduce splice loss, splice attenuation, should ensure that the optical fiber kind of each port of circulator and pilot light laser and post laser link match.

3. the fusing operation of conveniently coreless fiber and circulator Port3 port, select coreless fiber elder generation and the welding of circulator Port3 port of the band coat of one section of longer distance, then re-use the coat that heat-peeling forceps or coordinative solvent peel off coreless fiber, finally re-use as hydrofluoric acid equal solvent carries out surface corrosion frosting treatment to coreless fiber section.

4. preferred, evenly deriving to allow from the light of coreless fiber cladding surface scattering, selecting the low-refraction ultra-violet curing glue filling coreless fiber of refractive index lower than quartz and the gap of quartz ampoule (groove), as DF0016, and having Al in colloid internal mix ₂o ₃powder.Not selecting high folding glue to be to prevent scattered light from being derived very soon, making this section of power density too high, threatening the safety and stability of laser.

Above execution mode is only for illustration of the utility model; and be not limitation of the utility model; the those of ordinary skill of relevant technical field; when not departing from spirit and scope of the present utility model; can also make a variety of changes and modification; therefore all equivalent technical schemes also belong to category of the present utility model, and scope of patent protection of the present utility model should be defined by the claims.

The utility model is not limited to aforesaid embodiment.The utility model expands to any new feature of disclosing in this manual or any combination newly, and the step of the arbitrary new method disclosed or process or any combination newly.

Claims (3)

1. a high-power all-fiber laser pilot light device, is characterized in that: include pilot light laser, bundling device, high power annular equipment, Optical Maser System and quartz ampoule that tail optical fiber exports; Described high power annular equipment includes three ports, and port is respectively port1, port2 and port3; The tail optical fiber output of described pilot light laser is connected with port1 port; The signal input part of described bundling device is connected with port2 port; Coreless fiber is provided with in described quartz ampoule; Described coreless fiber is connected with port3 port; The output of described bundling device is connected with Optical Maser System; Described coreless fiber is by being mixed with Al ₂o ₃the low-refraction glue curing of powder is in quartz ampoule.

2. a kind of high-power all-fiber laser pilot light device according to claim 1, is characterized in that: the length of described coreless fiber is greater than D × n _quartz/ 2NA, wherein D is coreless fiber diameter, and NA is circulator Port3 fiber numerical aperture, n _quartzfor quartzy refractive index.

3. a kind of high-power all-fiber laser pilot light device according to claim 1, is characterized in that: the tolerance power of described high power annular equipment is greater than the reverse signal luminous power of Optical Maser System.