CN105633783A - Block solid laser taking fiber grating as output endoscope - Google Patents
Block solid laser taking fiber grating as output endoscope Download PDFInfo
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- CN105633783A CN105633783A CN201610207621.6A CN201610207621A CN105633783A CN 105633783 A CN105633783 A CN 105633783A CN 201610207621 A CN201610207621 A CN 201610207621A CN 105633783 A CN105633783 A CN 105633783A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/105—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the mutual position or the reflecting properties of the reflectors of the cavity, e.g. by controlling the cavity length
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- Optics & Photonics (AREA)
- Lasers (AREA)
Abstract
The present invention provides a block solid laser taking fiber grating as an output endoscope. The block solid laser taking fiber grating as output endoscope is composed of a pumping semiconductor laser 1, a coupling optical system 2, block solid operation material 3, a mode matching lens 4 and fiber grating 5 which are arranged in turn from an input end to an output end. The coupling optical system 2 emitted by the pumping semiconductor laser 1 is focused to the block solid operation material 3; the left end of the block solid operation material 3 is coated with wavelength high transmittance dielectric film emitted by the pumping semiconductor laser 1 and wavelength high reflectivity dielectric film emitted by the block solid operation material 3 to form the total reflective mirror of the block solid laser; the mode matching lens 4 is configured to realize the mode matching between the block solid operation material 3 and the fiber grating 5; and the fiber grating 5 is taken as the output endoscope. The block solid laser taking fiber grating as an output endoscope solves the problems that the fiber coupling output of a block solid laser, high gain spectral line inhibition, narrow linewidth output and simple structure cannot be had at the same time.
Description
[technical field]
The present invention relates to field of photoelectric devices, it is specifically related to a kind of solid statelaser.
[background technology]
Laser apparatus, since invention, has obtained investigation and application widely with advantages such as its good interference, monochromaticity, directivity. Blocks of solid laser apparatus exports chamber mirror and is generally recessed or plano-convex eyeglass average, flat. After the laser coupled exported enters single-mode fiber, owing to coupling efficiency is low, often loss > 50% even more power or energy. In order to obtain the Laser output of low gain, it is necessary to design on the mirror of output chamber and be coated with complicated rete to suppress the running of high gain lasers. Although optical fiber laser can direct optical fiber coupling output, but output spectra line is wider; And export to obtain narrow-linewidth laser, it is necessary in chamber, add the frequency-selecting optical element such as etalon, double refraction spectral filter, sometimes also need to use annular chamber to suppress effects of spatial, complex structure. Optical fiber laser needs low temperature even to use cooled with liquid nitrogen for obtaining low gain laser line, system complex. Optical fiber laser is in order to obtain narrow linewidth, low gain Laser output, and the general method adopting seed source to amplify, therefore optical fiber coupling output, suppression high gain spectrum line, narrow linewidth export the focus that technology becomes the research of current laser field.
[summary of the invention]
In order to the problem solving blocks of solid laser fiber coupling output, high gain spectrum line suppresses, narrow linewidth exports and structure simply cannot get both, the present invention provides a kind of and adopts fiber grating as the blocks of solid laser apparatus exporting chamber mirror.
The present invention adopts following technical scheme, it is to construct blocks of solid laser apparatus, is made up of the pumping semiconductor laser 1 arranged successively from input terminus to output terminal, coupling optical system 2, blocks of solid operation material 3, pattern match lens 4, fiber grating 5;
The light that pumping semiconductor laser 1 sends focuses on blocks of solid operation material 3 through coupling optical system 2;
Its left side of blocks of solid operation material 3 is coated with pumping semiconductor laser (1) transmitted wave and grows tall the anti-deielectric-coating and blocks of solid operation material (3) transmitted wave grows tall, and forms the total reflective mirror of this blocks of solid laser apparatus;
Pattern match lens 4, for the pattern match realized between blocks of solid operation material 3 and fiber grating 5;
Fiber grating 5 is as output chamber mirror.
Preferably, described fiber grating 5 is single mode list covering or single-mode double-clad optical fiber, and the fibre core of optical fiber is inscribed the bragg grating with blocks of solid operation material 3 emission wavelength.
Preferably, the reflectivity of described fiber grating 5 is chosen between 60% to 98% according to blocks of solid operation material 3 emission wavelength, and 3dB reflection bandwidth is less than 0.2nm.
Preferably, described fiber grating 5 two ends are 8 degree of angles of wedge.
Preferably, described pumping semiconductor laser 1 operation wavelength is 660nm or 793nm or 808nm or 880nm or 980nm.
Preferably, described coupling optical system 2 can be optical fiber or spherical lens or non-spherical lens or prism, it is achieved the coupling between pump light and laser cavity mould.
Preferably, described blocks of solid operation material 3 is the crystalline material or the glass material that are doped with rare earth ion.
Preferably, described blocks of solid operation material 3 right side is coated with the antireflective film of blocks of solid operation material 3 emission wavelength.
Preferably, described pattern match lens 4 both ends of the surface are coated with the antireflective film of blocks of solid operation material 3 emission wavelength.
Preferably, described pattern match lens 4 are non-spherical lens or spherical lens or determine index lens or gradual index lens.
The Advantageous Effects of the present invention is: the present invention, by the output chamber mirror of fiber grating as blocks of solid laser apparatus, solves blocks of solid laser fiber coupling output, high gain spectrum line suppresses, narrow linewidth exports and structure simply cannot get both problem; Achieve the output of the direct Single-Mode Fiber Coupling within the scope of blocks of solid laser apparatus emission spectrum, low gain spectrum line exports, narrow-linewidth laser exports. This laser apparatus manufacture difficulty is low, structure simple, stable work in work, can be widely used in the fields such as the seed source of fiber amplifier, non-linear frequency conversion, fiber optic gyro, Fibre Optical Sensor.
[accompanying drawing explanation]
Fiber grating in Fig. 1 embodiment one is as the structure composition schematic diagram of the blocks of solid laser apparatus exporting chamber mirror.
[embodiment]
In order to make the technical scheme of this patent and technique effect clearly, below in conjunction with drawings and Examples, specific implementation of the patent mode is described in detail.
Embodiment one:
Such as Fig. 1, fiber grating in the present embodiment as the blocks of solid laser apparatus exporting chamber mirror, comprise arrange successively from input terminus to output terminal pumping semiconductor laser 1, coupling optical system 2, blocks of solid operation material 3, pattern match lens 4, fiber grating 5. The light that pumping semiconductor laser 1 sends focuses on blocks of solid operation material 3 through coupling optical system 2.
Pumping semiconductor laser 1 operation wavelength is 808nm.
Coupling optical system 2 can be non-spherical lens, for the coupling realized between pump light and laser cavity mould (laser cavity mould refers to the stable pattern formed after laser vibrates).
Blocks of solid operation material 3 is the crystalline material or the glass material that are doped with rare earth ion, for the gain media of this blocks of solid laser apparatus, such as Nd:YVO4 crystalline material, left side is coated with the 808nm wavelength height total reflective mirror of the deielectric-coating formation solid statelaser that 914nm low gain transmitted wave grows tall anti-thoroughly. Right side is coated with the antireflective film of 914nm wavelength, and this antireflective film can reduce cavity loss.
Index lens (being called for short C-Lens) determined by pattern match lens 4. Realize the pattern match between blocks of solid operation material 3 and fiber grating 5. Pattern match lens 4 both ends of the surface are coated with the antireflective film of 914nm wavelength, and this antireflective film can reduce cavity loss.
Fiber grating 5 is single mode list cladded-fiber or single-mode double-clad optical fiber, and the fibre core of optical fiber is inscribed the bragg grating of 914nm wavelength, forms the output chamber mirror of laser apparatus. Bragg grating reflectivity is 98%, 3dB reflection bandwidth 0.1nm. Fiber grating 5 two ends are 8 degree of angles of wedge, the cutting of 8 degree of angles, it is possible to suppress self-oscillatory laser end face to reflect. Fiber grating 5 is directly as laser chamber mirror, and its structure is optical fiber structure, and part light reflects through fiber grating, and another part light is through fiber grating coupling output, it is achieved that the direct Single-Mode Fiber Coupling of 914nm exports.
Blocks of solid laser apparatus in the present embodiment, because of the feature of Fiber Bragg Grating FBG, composes line to low gain and has high reflectivity, and line is composed for other higher gain and passes through completely, and cause loss, play the effect of suppression, export so low gain spectrum line can be realized; And it is very narrow that the reflectivity bandwidth of fiber grating can make, and three dB bandwidth can be less than 0.2nm, therefore can realize narrow-linewidth laser and export.
Embodiment two:
Fiber grating in the present embodiment is as the blocks of solid laser apparatus exporting chamber mirror, and structure is identical with in embodiment one.
Pumping semiconductor laser 1 operation wavelength is 880nm.
Coupling optical system 2 is spherical lens, is used for the coupling realized between pump light and laser cavity mould.
Blocks of solid operation material 3 is Nd:YVO4 crystalline material, and left side is coated with the 880nm wavelength height total reflective mirror of the deielectric-coating formation solid statelaser that 1064nm high gain transmitted wave grows tall anti-thoroughly. Right side is coated with the antireflective film of 1064nm wavelength, reduces cavity loss.
Pattern match lens 4 are that gradual index lens (is called for short: G-Lens). Realize the pattern match between blocks of solid operation material 3 and fiber grating 5. Pattern match lens 4 both ends of the surface are coated with the antireflective film of 1064nm wavelength, reduce cavity loss.
Fiber grating 5 is single mode list cladded-fiber, and the fibre core of optical fiber is inscribed the bragg grating of 1064nm wavelength, forms the output chamber mirror of laser apparatus. Bragg grating reflectivity is 90%, 3dB reflection bandwidth 0.1nm. Fiber grating 5 two ends are 8 degree of angles of wedge, the cutting of 8 degree of angles, suppress self-oscillatory laser end face to reflect.
Embodiment three:
Fiber grating in the present embodiment is as the blocks of solid laser apparatus exporting chamber mirror, and structure is identical with in embodiment one.
Pumping semiconductor laser 1 operation wavelength is 808nm.
Coupling optical system 2 can be that optical fiber or prism realize the coupling between pump light and laser cavity mould.
Blocks of solid operation material 3 is Nd:YAG crystalline material, and left side is coated with the 808nm wavelength height total reflective mirror of the deielectric-coating formation solid statelaser that 1112nm low gain transmitted wave grows tall anti-thoroughly. Right side is coated with the antireflective film of 1112nm wavelength, reduces cavity loss.
Index lens determined by pattern match lens 4, it is achieved the pattern match between blocks of solid operation material and fiber grating. Pattern match lens both ends of the surface are coated with the antireflective film of 1112nm wavelength, reduce cavity loss.
Fiber grating 5 is single mode list cladded-fiber, and the fibre core of optical fiber is inscribed the bragg grating of 1112nm wavelength, forms the output chamber mirror of laser apparatus. Bragg grating reflectivity is 96%, 3dB reflection bandwidth 0.1nm. Fiber grating two ends are 8 degree of angles of wedge, the cutting of 8 degree of angles, suppress self-oscillatory laser end face to reflect.
The foregoing is only the preferred embodiment of this patent, be not limited to this patent, for a person skilled in the art, this patent can have various modifications and variations. Within all spirit at this patent and principle, any amendment of doing, equivalent replacement, improvement etc., all should be included within the protection domain of this patent.
Claims (10)
1. fiber grating is as the blocks of solid laser apparatus exporting chamber mirror, is made up of the pumping semiconductor laser (1) arranged successively from input terminus to output terminal, coupling optical system (2), blocks of solid operation material (3), pattern match lens (4), fiber grating (5); It is characterized in that:
The light that pumping semiconductor laser (1) sends focuses on blocks of solid operation material (3) through coupling optical system (2);
Blocks of solid operation material (3) its left side is coated with pumping semiconductor laser (1) transmitted wave and grows tall the anti-deielectric-coating and blocks of solid operation material (3) transmitted wave grows tall, and forms the total reflective mirror of this blocks of solid laser apparatus;
Pattern match lens (4), for the pattern match realized between blocks of solid operation material (3) and fiber grating (5);
Fiber grating (5) is as exporting chamber mirror.
2. fiber grating as claimed in claim 1 is as the blocks of solid laser apparatus exporting chamber mirror, it is characterized in that: described fiber grating (5) is single mode list covering or single-mode double-clad optical fiber, the fibre core of optical fiber is inscribed the bragg grating with blocks of solid operation material (3) emission wavelength.
3. fiber grating as claimed in claim 2 is as the blocks of solid laser apparatus exporting chamber mirror, it is characterized in that: the reflectivity of described fiber grating (5) is chosen between 60% to 98% according to blocks of solid operation material (3) emission wavelength, and 3dB reflection bandwidth is less than 0.2nm.
4. if the fiber grating as described in arbitrary in claims 1 to 3 is as the blocks of solid laser apparatus exporting chamber mirror, it is characterised in that: described fiber grating (5) two ends are 8 degree of angles of wedge.
5. if the fiber grating as described in arbitrary in claims 1 to 3 is as the blocks of solid laser apparatus exporting chamber mirror, it is characterised in that: described pumping semiconductor laser (1) operation wavelength is 660nm or 793nm or 808nm or 880nm or 980nm.
6. if the fiber grating as described in arbitrary in claims 1 to 3 is as the blocks of solid laser apparatus exporting chamber mirror, it is characterized in that: described coupling optical system (2) is optical fiber or spherical lens or non-spherical lens or prism, it is achieved the coupling between pump light and laser cavity mould.
7. if the fiber grating as described in arbitrary in claims 1 to 3 is as the blocks of solid laser apparatus exporting chamber mirror, it is characterised in that: described blocks of solid operation material (3) is the crystalline material or the glass material that are doped with rare earth ion.
8. fiber grating as claimed in claim 7 is as the blocks of solid laser apparatus exporting chamber mirror, it is characterised in that: described blocks of solid operation material (3) right side is coated with the antireflective film of blocks of solid operation material (3) emission wavelength.
9. fiber grating as claimed in claim 1 is as the blocks of solid laser apparatus exporting chamber mirror, it is characterised in that: described pattern match lens (4) both ends of the surface are coated with the antireflective film of blocks of solid operation material (3) emission wavelength.
10. fiber grating as claimed in claim 1 is as the blocks of solid laser apparatus exporting chamber mirror, it is characterised in that: described pattern match lens (4) are non-spherical lens or spherical lens or determine index lens or gradual index lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610207621.6A CN105633783A (en) | 2016-04-01 | 2016-04-01 | Block solid laser taking fiber grating as output endoscope |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610207621.6A CN105633783A (en) | 2016-04-01 | 2016-04-01 | Block solid laser taking fiber grating as output endoscope |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021223439A1 (en) * | 2020-05-08 | 2021-11-11 | 武汉光迅科技股份有限公司 | Optical amplifier |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008025076A1 (en) * | 2006-08-29 | 2008-03-06 | Macquarie University | An optical amplifier, a laser and methods of manufacture thereof |
| CN202550278U (en) * | 2012-04-13 | 2012-11-21 | 上海高意激光技术有限公司 | Intracavity fiber coupling laser |
| CN104852263A (en) * | 2015-05-29 | 2015-08-19 | 福建福晶科技股份有限公司 | Composite gain passive modulation microchip laser |
| CN205543680U (en) * | 2016-04-01 | 2016-08-31 | 北京理工大学珠海学院 | Fiber grating is as cubic solid laser of output cavity mirror |
-
2016
- 2016-04-01 CN CN201610207621.6A patent/CN105633783A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008025076A1 (en) * | 2006-08-29 | 2008-03-06 | Macquarie University | An optical amplifier, a laser and methods of manufacture thereof |
| CN202550278U (en) * | 2012-04-13 | 2012-11-21 | 上海高意激光技术有限公司 | Intracavity fiber coupling laser |
| CN104852263A (en) * | 2015-05-29 | 2015-08-19 | 福建福晶科技股份有限公司 | Composite gain passive modulation microchip laser |
| CN205543680U (en) * | 2016-04-01 | 2016-08-31 | 北京理工大学珠海学院 | Fiber grating is as cubic solid laser of output cavity mirror |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021223439A1 (en) * | 2020-05-08 | 2021-11-11 | 武汉光迅科技股份有限公司 | Optical amplifier |
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