CN111509538A - Gain-related wavelength-controlled and tunable ultrashort pulse laser generation method and device - Google Patents
Gain-related wavelength-controlled and tunable ultrashort pulse laser generation method and device Download PDFInfo
- Publication number
- CN111509538A CN111509538A CN202010229884.3A CN202010229884A CN111509538A CN 111509538 A CN111509538 A CN 111509538A CN 202010229884 A CN202010229884 A CN 202010229884A CN 111509538 A CN111509538 A CN 111509538A
- Authority
- CN
- China
- Prior art keywords
- wavelength
- laser
- gain
- output
- fiber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- H01S3/102—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
-
- 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
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
-
- 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
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
- H01S3/06716—Fibre compositions or doping with active elements
-
- 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
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/0675—Resonators including a grating structure, e.g. distributed Bragg reflectors [DBR] or distributed feedback [DFB] fibre lasers
-
- 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
- H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
- H01S3/16—Solid materials
- H01S3/1601—Solid materials characterised by an active (lasing) ion
- H01S3/1603—Solid materials characterised by an active (lasing) ion rare earth
- H01S3/1618—Solid materials characterised by an active (lasing) ion rare earth ytterbium
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
Abstract
The invention provides a gain-related wavelength-controlled tunable ultrashort pulse laser generation method and device, and solves the problems of complex structure and poor stability and operability in the existing tunable laser generation process. The method realizes gain and loss control of oscillation wavelength in a laser oscillation cavity by regulating and controlling the length of the ytterbium ion doped gain optical fiber, thereby achieving the purposes that the output wavelength of the ultrashort pulse laser is controlled and the output is tunable; the ytterbium ion doped gain fiber has both radiation characteristic and absorption characteristic. The device comprises a pumping light source, a wavelength division multiplexer, a chirped fiber grating, a ytterbium ion doped gain fiber, a semiconductor saturable absorber mirror and an isolator, wherein the wavelength division multiplexer, the chirped fiber grating, the ytterbium ion doped gain fiber, the semiconductor saturable absorber mirror and the isolator are sequentially connected to form a laser oscillation cavity; the length of the ytterbium ion-doped gain fiber is adapted to the output wavelength of the ultrashort pulse laser, and the chirped fiber grating is connected with the first signal output end of the wavelength division multiplexer; and the second signal output end of the wavelength division multiplexer is connected with the isolator.
Description
Technical Field
The invention relates to a laser technology, in particular to a gain-related wavelength-controlled tunable ultrashort pulse laser generation method and device.
Background
Femtosecond laser is an important laser technology, and has irreplaceability in fields of high-field physics, attosecond science, material science, extreme manufacturing and the like due to extremely short duration and extremely high instantaneous power. Until now, researchers still develop towards ultrafast femtosecond lasers with shorter pulse width, higher average power, larger single pulse energy and stronger peak power, and continuously pursue the limit of ultrafast lasers to meet special application requirements.
The wavelength tuning is an important direction for femtosecond laser research, and has important application value in the fields of time-resolved spectroscopy, quantum optics, nanoscience, atmospheric composition detection and the like. Especially, the structure is compact, the output parameter is controllable, the femtosecond laser can be continuously tunable in the near infrared band, and the femtosecond laser has the characteristics of low scattering, small risk of tissue damage and the like, can be used for the researches of simulation, excision, fusion, nerve tissue regeneration, cell fusion and the like of neurons on a single cell scale, and provides a brand new means for the life science research represented by neurobiology.
Currently, there are two main types of commonly used tunable femtosecond fiber laser generation schemes:
the first kind, dispersive wave generation scheme, is based on the principle that when a femtosecond laser pulse is transmitted nonlinearly in the negative dispersion region of a photonic crystal fiber, the incident pulse will undergo high-order soliton splitting to generate a raman pulse, and self-frequency shift will occur under the influence of raman scattering within the pulse. When the Raman solitons are disturbed by high-order dispersion in the optical fiber medium, the dispersion waves are formed in the positive dispersion area of the photonic crystal fiber, and tunable femtosecond laser output is generated.
Firstly, the generation of dispersion wave puts strict requirements on the central wavelength of incident femtosecond laser and the parameters of the photonic crystal fiber, namely the central wavelength of the pumping pulse can only work in a negative dispersion region of the photonic crystal fiber to generate effective dispersion wave radiation; secondly, the generation mechanism of the dispersion wave determines that the scheme can only realize femtosecond laser output with the wavelength shorter than the pumping wavelength, and the flexibility is lacked.
The second kind, based on the spectrum broadening of the nonlinear effect such as self-phase modulation and the scheme of tunable femtosecond laser generation with wide band based on the effective spectrum selection technology, the principle is that when the femtosecond laser pulse is transmitted in the optical fiber in a nonlinear way, the generated nonlinear optical effect such as self-phase modulation and self-steepness can make the incident femtosecond pulse spectrum widen significantly and present high coherence multimodal distribution. The multi-peak distribution and high coherence of the spectrum enable the spectrum at each peak to be filtered by a filter with the same center wavelength and spectral bandwidth, and a broadband tunable femtosecond laser output close to the Fourier transform limit is obtained.
In the scheme, however, the generation of the broadband tunable femtosecond laser firstly needs laser to be coupled into a femtosecond nonlinear optical fiber, and after transmission for a certain distance, spectral slicing is selectively performed by using a discrete spatial filter to realize tunable ultrashort pulse output. Free space coupling and the introduction of more discrete components lead to poor system reliability, and the resulting tunable ultrashort pulse laser is limited by various factors, such as the power of the pump laser, the pulse width, and the structural parameters of the photonic crystal fiber, and lacks flexibility.
One feature common to both of the above laser generation schemes is that during the generation of the tunable femtosecond laser, an independent femtosecond pump light source and a section of nonlinear optical fiber are required, resulting in a complex system structure and poor stability and operability.
Disclosure of Invention
In order to solve the technical problems of complex structure and poor stability and operability caused by the fact that an independent femtosecond pump light source and a section of nonlinear optical fiber are needed in the existing tunable laser generation process, the invention provides a method and a device for generating gain-related wavelength-controlled tunable ultrashort pulse laser.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a gain-related wavelength-controlled and tunable ultrashort pulse laser generation method is characterized in that: the gain and loss control of the oscillation wavelength in the laser oscillation cavity is realized by regulating and controlling the length of the ytterbium ion-doped gain optical fiber, so that the output wavelength of the ultrashort pulse laser is controlled and output in a tunable manner;
the ytterbium ion doped gain fiber has radiation characteristics and absorption characteristics at the same time, wherein the radiation characteristics are that different laser wavelengths correspond to different laser gains under different lengths of the gain fiber; the absorption characteristics are that different laser wavelengths correspond to different laser losses under different lengths of the gain optical fiber.
Further, the gain and loss control of the oscillation wavelength in the laser oscillation cavity is realized by shortening the length of the ytterbium ion doped gain optical fiber until the laser gain of the short wave wavelength in the oscillation cavity is greater than the loss and the laser gain of the long wave wavelength is less than the loss, so that the output wavelength of the laser is controlled and can be output in a tunable mode when the output wavelength of the ultrashort pulse laser is short wave;
the gain and loss control of the oscillation wavelength in the laser oscillation cavity is realized by increasing the length of the ytterbium ion doped gain optical fiber until the laser gain of the long wavelength in the oscillation cavity is greater than the loss and the laser gain of the short wavelength is less than the loss, so that the control and tunable output of the laser output wavelength when the output wavelength of the ultrashort pulse laser is the long wavelength are realized.
Further, the short wave and the long wave refer to central wavelengths corresponding to a spectrum with a certain spectral bandwidth output by a laser;
the certain spectral bandwidth is 10nm-20 nm; the spectrum corresponds to a center wavelength between 1058.3-1064.3 nm.
Furthermore, the gain and loss characteristics of different laser wavelengths can be regulated and controlled by changing the length of the ytterbium ion doped gain optical fiber introduced into the oscillation cavity, so that the output central wavelength of the ultrashort pulse laser can be changed, and the control and tuning of the output wavelength of the ultrashort pulse laser can be realized;
wherein the length range of the ytterbium ion doped gain fiber is 0.5-3.2 m.
Meanwhile, the invention provides a gain-related wavelength-controlled and tunable ultrashort pulse laser generation device, which is characterized in that: the optical fiber laser comprises a pumping light source, a wavelength division multiplexer, a chirped fiber grating, ytterbium ion doped gain fibers, a semiconductor saturable absorber mirror and an isolator; the length of the ytterbium ion doped gain fiber is adapted to the output wavelength of the ultrashort pulse laser;
the pumping light source, the wavelength division multiplexer, the chirped fiber grating, the ytterbium ion doped gain fiber and the semiconductor saturable absorber are sequentially connected to form a full polarization maintaining fiber linear laser oscillation cavity;
the chirped fiber grating is connected with a first signal output end of the wavelength division multiplexer;
and the second signal output end of the wavelength division multiplexer is connected with the isolator.
Furthermore, the length of the ytterbium ion doped gain fiber is adapted to the output wavelength of the laser, and the gain and loss control of the oscillation wavelength in the laser oscillation cavity is realized by shortening the length of the ytterbium ion doped gain fiber until the laser gain of the short wavelength in the oscillation cavity is greater than the loss and the laser gain of the long wavelength is less than the loss, so that the output wavelength of the laser is controlled and output in a tunable manner when the output wavelength of the laser is the short wavelength;
or the length of the ytterbium ion doped gain fiber is increased until the laser gain of the long wavelength in the oscillation cavity is greater than the loss, and the laser gain of the short wavelength is less than the loss, so that the gain and the loss of the oscillation wavelength in the laser oscillation cavity are controlled, and the output wavelength of the laser is controlled and can be output in a tunable mode when the output wavelength of the laser is the long wavelength.
Furthermore, the center wavelength of the chirped fiber grating is 1064nm, the reflection bandwidth is 24.3nm, the reflectivity is 24.5%, and the dispersion coefficient is 0.25 ps/nm.
Further, the length range of the ytterbium ion doped gain fiber is 0.5-3.2 m.
Further, a second signal output end of the wavelength division multiplexer outputs a center wavelength corresponding to a spectrum with a certain spectral bandwidth;
the certain spectral bandwidth is 10nm-20 nm;
the spectrum corresponds to a center wavelength between 1058.3-1064.3 nm.
Compared with the prior art, the invention has the advantages that:
1. the laser generation method and the laser device can realize the wavelength tuning of the laser output by the ultrashort pulse laser only by controlling the length of the ytterbium ion doped gain fiber, do not need complicated nonlinear related technical means, and have the advantages of compact structure and environmental stability.
2. The laser generation method ensures compact structure and high reliability on the basis of realizing broadband tuning ultrashort pulse laser output, realizes real strict all-fiber stable operation, and avoids the defects that the existing tunable laser adopts a free space coupling mode, so that the tunable laser has a complex structure and a large volume and is not beneficial to practical application.
Drawings
FIG. 1 is a schematic illustration of the radiation and absorption characteristics of a ytterbium ion doped gain fiber;
wherein a is the reabsorption loss curve and b is the radiation gain curve;
FIG. 2 is a schematic structural diagram of an embodiment of a gain-dependent wavelength-controlled tunable ultrashort pulse laser generating device according to the present invention;
FIG. 3 is a schematic diagram of an output center wavelength corresponding to a ytterbium ion-doped gain fiber having a length of 0.5m according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of an output center wavelength corresponding to a ytterbium ion-doped gain fiber length of 1.2m according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of an output center wavelength corresponding to a 2m length of an ytterbium ion-doped gain fiber according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of an output center wavelength corresponding to a 2.5m length of an ytterbium ion-doped gain fiber in an embodiment of the present invention;
FIG. 7 is a schematic diagram of an output center wavelength corresponding to a ytterbium ion-doped gain fiber length of 3.2m according to an embodiment of the present invention;
wherein the reference numbers are as follows:
the optical fiber laser comprises a 1-pumping light source, a 2-wavelength division multiplexer, a 3-chirped fiber grating, a 4-ytterbium ion doped gain fiber, a 5-semiconductor saturable absorber mirror and a 6-isolator.
Detailed Description
The invention is described in further detail below with reference to the figures and specific embodiments.
The principle of the invention is as follows: the ytterbium ion doped gain fiber has complex radiation and absorption characteristics, as shown in fig. 1, wherein the radiation characteristic is reflected in the final laser gain, and the absorption characteristic is finally reflected in the reabsorption of the laser, i.e. equivalent to the laser loss characteristic. Laser oscillation at a certain wavelength is the result of both gain and loss. Therefore, in the generation and amplification process of the ultrashort pulse laser, the oscillation and amplification at a certain wavelength of the laser mainly depend on the pumping power, the working wavelength range of the laser device, and the length of the gain fiber. The design of the laser oscillation cavity is usually specific, i.e. the pump power, the working wavelength range of the laser device is fixed, usually 1000-. Different gain optical fiber lengths correspond to different pump absorption rates, and further correspond to different laser gains at different wavelengths. Therefore, the specific central wavelength oscillation of the laser can be realized by controlling the length of the laser gain fiber, and the wavelength tuning output of a single laser is further realized.
A gain-related wavelength-controlled and tunable ultrashort pulse laser generation method realizes gain and loss control of oscillation wavelength in a laser oscillation cavity by regulating and controlling the length of ytterbium ion-doped gain fiber, thereby achieving controlled and tunable output of the output wavelength of an ultrashort pulse laser; the ytterbium ion doped gain fiber has both radiation characteristic and absorption characteristic, and the radiation characteristic is that different laser wavelengths correspond to different laser gains under different lengths of the gain fiber; the absorption characteristics are that under different gain fiber lengths, different laser wavelengths correspond to different laser losses, and the radiation and absorption characteristics or the gain and loss characteristics of the ytterbium ion doped gain fiber are functions related to the length of the ytterbium ion doped gain fiber.
When the laser is required to output short waves, the length of the ytterbium ion doped gain optical fiber is shortened until the laser gain of the short wave wavelength in the oscillation cavity is greater than the loss, and the laser gain of the long wave wavelength is less than the loss;
when the laser is required to output long-wave, the length of the ytterbium ion doped gain optical fiber is increased until the laser gain of the long-wave wavelength in the oscillation cavity is greater than the loss, and the laser gain of the short-wave wavelength is less than the loss;
wherein, the short wave and the long wave specifically refer to the central wavelength corresponding to the spectrum with a certain spectral bandwidth (usually 10nm-20nm) output by the laser; the central wavelength of the spectrum is in the range of 1058.3-1064.3nm, and the short wave and the long wave are relatively short and long in the wavelength range.
Meanwhile, the present embodiment provides a gain-related wavelength-controlled and tunable ultrashort pulse laser generating device, which has the core idea that based on the radiation and absorption characteristics of ytterbium ion doped gain fibers, and the result of the combined action of gain and loss of laser oscillation at a certain wavelength in a laser (that is, if the gain is greater than the loss at a certain wavelength, the wavelength oscillation output can be realized), the gain and loss control of a certain oscillation wavelength in a laser oscillation cavity is realized by adjusting and controlling the length of the gain fiber, so as to achieve the output wavelength-controlled and tunable output, as shown in fig. 2, the laser device includes a pumping light source 1, a wavelength division multiplexer 2, a chirped fiber grating 3, a ytterbium ion doped gain fiber 4, a semiconductor saturable absorber 5, and an isolator 6; wherein the center wavelength of the chirped fiber grating 3 is 1064nm, the reflection bandwidth is 24.3nm, the reflectivity is 24.5%, and the dispersion coefficient is 0.25 ps/nm; the output end of the pumping light source 1 is connected with the pumping end of the wavelength division multiplexer 2; the first signal output end of the wavelength division multiplexer 2 is connected with one end of the chirped fiber grating 3, the other end of the chirped fiber grating 3 is connected with one end of the ytterbium ion doped gain fiber 4, and the other end of the ytterbium ion doped gain fiber 4 is connected with the semiconductor saturable absorber 5, so that the pumping light source 1, the wavelength division multiplexer 2, the chirped fiber grating 3, the ytterbium ion doped gain fiber 4 and the semiconductor saturable absorber 5 are sequentially connected to form a fully polarization-maintaining fiber linear laser oscillation cavity.
The length of the ytterbium ion doped gain fiber 4 is adapted to the output wavelength of the ultrashort pulse laser, and the length of the ytterbium ion doped gain fiber 4 is cut until the output wavelength meeting the actual requirement is reached. When the ytterbium ion doped gain fiber 4 is short, the gain of the short wavelength laser in the oscillation cavity is greater than loss, and the gain of the long wavelength laser is less than loss, so that the ultrashort pulse laser outputs short wave; when the ytterbium ion-doped gain fiber 4 is long, the laser gain at the long wavelength in the oscillation cavity is > loss, and the laser gain at the short wavelength is < loss, so that the ultrashort pulse laser outputs a long wave. The length of the ytterbium ion doped gain fiber 4 introduced into the oscillation cavity is optimized, so that the regulation and control of gain and loss characteristics of different laser wavelengths can be realized, the output center wavelength of the ultrashort pulse laser is changed, and the control and tuning of the output wavelength of the ultrashort pulse laser are realized; wherein the length of the ytterbium ion doped gain fiber is preferably 0.5-3.2 m.
In the laser, a pump light source 1 is a single-mode pump laser source, the single-mode pump laser source couples pump power to a single-mode ytterbium ion-doped gain fiber 4 through a wavelength division multiplexer 2 to generate gain required by laser oscillation, a broadband chirped fiber grating 3 with a center wavelength of 1064nm is adopted in an oscillation cavity as a pulse time domain shaping device, the broadband chirped fiber grating 3 outputs 75.5% of mode-locked laser power, only slow-axis laser oscillation exists in a laser resonant cavity, and the broadband chirped fiber grating 3 reflects the remaining 24.5% of power back into the resonant cavity to form laser oscillation. By optimizing the length of the ytterbium ion doped gain fiber 4, the broadband tunable femtosecond laser output of 1058.5-1064.3nm can be realized.
As shown in fig. 3 to 7, under the condition that the total cavity length of the oscillation cavity is not changed, by adjusting the length of the ytterbium ion doped gain fiber 4, ultrashort pulse outputs at different central wavelengths can be realized.
The laser can realize all-fiber tunable ultrashort pulse output, simultaneously ensures the structural compactness and environmental stability of the laser, realizes real all-fiber stable operation in a strict sense, and avoids the defects that the existing tunable laser adopts a free space coupling mode, has a complex structure and a large volume, is not beneficial to practical application and the like. The method has important significance for improving the output parameter and the reliability of the ultrashort pulse laser, and has important application value in two-photon microscopic imaging in the fields of brain science and brain-like research.
The above description is only for the purpose of describing the preferred embodiments of the present invention and does not limit the technical solutions of the present invention, and any known modifications made by those skilled in the art based on the main technical concepts of the present invention fall within the technical scope of the present invention.
Claims (9)
1. A method for generating gain-dependent wavelength-controlled and tunable ultrashort pulse laser, characterized by: the gain and loss control of the oscillation wavelength in the laser oscillation cavity is realized by regulating and controlling the length of the ytterbium ion-doped gain optical fiber, so that the output wavelength of the ultrashort pulse laser is controlled and output in a tunable manner;
the ytterbium ion doped gain fiber has radiation characteristics and absorption characteristics at the same time, wherein the radiation characteristics are that different laser wavelengths correspond to different laser gains under different lengths of the gain fiber; the absorption characteristic is that under different lengths of the gain optical fiber, different laser wavelengths correspond to different laser reabsorption losses.
2. The gain-dependent wavelength-controlled and tunable ultrashort pulse laser generation method of claim 1, wherein: the gain and loss control of the oscillation wavelength in the laser oscillation cavity is realized by shortening the length of the ytterbium ion doped gain optical fiber until the laser gain of the short wave wavelength in the oscillation cavity is greater than the loss and the laser gain of the long wave wavelength is less than the loss, so that the output wavelength of the laser is controlled and can be output in a tunable mode when the output wavelength of the ultrashort pulse laser is the short wave;
or the length of the ytterbium ion doped gain fiber is increased until the laser gain of the long wavelength in the oscillation cavity is greater than the loss, and the laser gain of the short wavelength is less than the loss, so that the gain and loss control of the oscillation wavelength in the laser oscillation cavity is realized, and the control and tunable output of the laser output wavelength when the output wavelength of the ultrashort pulse laser is the long wavelength are further realized.
3. The method of claim 2, wherein the gain-dependent wavelength-controlled and tunable ultrashort pulse laser generation is: the short wave and the long wave refer to the central wavelength corresponding to the spectrum with a certain spectral bandwidth output by the laser;
the certain spectral bandwidth is 10nm-20 nm; the spectrum corresponds to a center wavelength between 1058.3-1064.3 nm.
4. The method of gain-dependent wavelength-controlled and tunable ultrashort pulse laser generation of claim 1 or 2 or 3, wherein: the gain and loss characteristics of different laser wavelengths are regulated and controlled by changing the length of the ytterbium ion doped gain optical fiber introduced into the oscillation cavity, so that the output central wavelength of the ultrashort pulse laser is changed, and the output wavelength of the ultrashort pulse laser is controlled and tunable;
wherein the length range of the ytterbium ion doped gain fiber is 0.5-3.2 m.
5. A gain-dependent wavelength-controlled tunable ultrashort pulse laser generating device, comprising: the optical fiber laser comprises a pumping light source (1), a wavelength division multiplexer (2), a chirped fiber grating (3), ytterbium ion doped gain fibers (4), a semiconductor saturable absorber mirror (5) and an isolator (6); the length of the ytterbium ion doped gain fiber (4) is adapted to the output wavelength of the ultrashort pulse laser;
the pump light source (1), the wavelength division multiplexer (2), the chirped fiber grating (3), the ytterbium ion doped gain fiber (4) and the semiconductor saturable absorber (5) are sequentially connected to form a full polarization maintaining fiber linear laser oscillation cavity;
the chirped fiber grating (3) is connected with a first signal output end of the wavelength division multiplexer (2);
and a second signal output end of the wavelength division multiplexer (2) is connected with the isolator (6).
6. The gain-related wavelength-controlled and tunable ultrashort pulse laser generating device of claim 5, wherein:
the length of the ytterbium ion doped gain fiber (4) is adapted to the output wavelength of the laser, and the gain and loss control of the oscillation wavelength in the laser oscillation cavity is realized by shortening the length of the ytterbium ion doped gain fiber until the laser gain of the short wavelength in the oscillation cavity is greater than the loss and the laser gain of the long wavelength is less than the loss, so that the output wavelength of the laser is controlled and can be output in a tunable mode when the output wavelength of the laser is the short wavelength;
or the length of the ytterbium ion doped gain fiber is increased until the laser gain of the long wavelength in the oscillation cavity is greater than the loss, and the laser gain of the short wavelength is less than the loss, so that the gain and the loss of the oscillation wavelength in the laser oscillation cavity are controlled, and the output wavelength of the laser is controlled and can be output in a tunable mode when the output wavelength of the laser is the long wavelength.
7. The gain-related wavelength-controlled and tunable ultrashort pulse laser generating device of claim 6, wherein: the center wavelength of the chirped fiber grating (3) is 1064nm, the reflection bandwidth is 24.3nm, the reflectivity is 24.5%, and the dispersion coefficient is 0.25 ps/nm.
8. The gain-related wavelength-controlled and tunable ultrashort pulse laser generating device of claim 5 or 6 or 7, wherein: the length range of the ytterbium ion doped gain fiber (4) is 0.5-3.2 m.
9. The gain-related wavelength-controlled and tunable ultrashort pulse laser generating device of claim 8, wherein: a second signal output end of the wavelength division multiplexer (2) outputs a center wavelength corresponding to a spectrum with a certain spectral bandwidth;
the certain spectral bandwidth is 10nm-20 nm;
the spectrum corresponds to a center wavelength between 1058.3-1064.3 nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010229884.3A CN111509538A (en) | 2020-03-27 | 2020-03-27 | Gain-related wavelength-controlled and tunable ultrashort pulse laser generation method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010229884.3A CN111509538A (en) | 2020-03-27 | 2020-03-27 | Gain-related wavelength-controlled and tunable ultrashort pulse laser generation method and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111509538A true CN111509538A (en) | 2020-08-07 |
Family
ID=71871796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010229884.3A Pending CN111509538A (en) | 2020-03-27 | 2020-03-27 | Gain-related wavelength-controlled and tunable ultrashort pulse laser generation method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111509538A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030118060A1 (en) * | 2001-09-24 | 2003-06-26 | Gigatera Ag | Pulse-generating laser |
| CN101510663A (en) * | 2009-03-06 | 2009-08-19 | 苏州大学 | Polarization dual wavelength fiber-optical ultrashort pulse laser |
| CN204992236U (en) * | 2015-09-23 | 2016-01-20 | 深圳市欧凌镭射科技有限公司 | Passive mode locking linear polarization psec pulsed optical fibre laser ware |
| CN106785843A (en) * | 2017-01-18 | 2017-05-31 | 浙江工贸职业技术学院 | A kind of fine tunable single-frequency short cavity optical fiber laser of frequency |
| CN108039636A (en) * | 2017-12-12 | 2018-05-15 | 南京大学 | A kind of mid-infrared light fibre optical parametric oscillator based on 2 μm of ultra-short pulse laser pumpings |
| CN110165537A (en) * | 2019-05-22 | 2019-08-23 | 中国计量大学 | A kind of tunable wave length passive mode-locking fiber laser based on loss control |
-
2020
- 2020-03-27 CN CN202010229884.3A patent/CN111509538A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030118060A1 (en) * | 2001-09-24 | 2003-06-26 | Gigatera Ag | Pulse-generating laser |
| CN101510663A (en) * | 2009-03-06 | 2009-08-19 | 苏州大学 | Polarization dual wavelength fiber-optical ultrashort pulse laser |
| CN204992236U (en) * | 2015-09-23 | 2016-01-20 | 深圳市欧凌镭射科技有限公司 | Passive mode locking linear polarization psec pulsed optical fibre laser ware |
| CN106785843A (en) * | 2017-01-18 | 2017-05-31 | 浙江工贸职业技术学院 | A kind of fine tunable single-frequency short cavity optical fiber laser of frequency |
| CN108039636A (en) * | 2017-12-12 | 2018-05-15 | 南京大学 | A kind of mid-infrared light fibre optical parametric oscillator based on 2 μm of ultra-short pulse laser pumpings |
| CN110165537A (en) * | 2019-05-22 | 2019-08-23 | 中国计量大学 | A kind of tunable wave length passive mode-locking fiber laser based on loss control |
Non-Patent Citations (4)
| Title |
|---|
| QIANG FANG, ET AL.: ""An All-Fiber 2-um Wavelength-Tunable Mode-Locked Laser"", 《IEEE PHOTONICS TECHNOLOGY LETTERS》 * |
| TIMOTHY S. MCCOMB, ET AL.: ""Tunable High Power Thulium Fiber Lasers"", 《2010 23RD ANNUAL MEETING OF THE IEEE PHOTONICS SOCIETY》 * |
| 张怡静等: "全光纤结构波长可调谐被动锁模掺铥光纤激光器", 《中国激光》 * |
| 沈炎龙等: "中红外可调谐增益开关Er:ZBLAN脉冲光纤激光器", 《现代应用物理》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8587864B2 (en) | Inexpensive variable rep-rate source for high-energy, ultrafast lasers | |
| CN105826800B (en) | All-fiber broadband flat mid-infrared super-continuum spectrum light source | |
| DE19956739A1 (en) | Ultra-short optical pulse laser, especially a mode-coupled laser pulse source used in telecommunications, has an optical guide element for restricting amplified light to the fundamental mode of a multi mode fiber | |
| CN109802290B (en) | Intermediate infrared ultrashort pulse fiber laser based on synchronous mode locking | |
| CN104158075A (en) | Super Gaussian pulse generation method and device on basis of gain reshaping | |
| CN108390248B (en) | Dual-wavelength and wavelength-tunable passive mode-locking fiber laser | |
| CN111509537B (en) | All-fiber ultrashort pulse mode-locked laser generation method and laser | |
| CN216773786U (en) | Broadband tunable intermediate infrared all-fiber ultrashort pulse laser | |
| CN110323663B (en) | Device and method for generating vector ultrashort laser pulse of intermediate infrared band | |
| CN203014156U (en) | High-power high-efficiency super-continuous spectrum light source | |
| CN113054520B (en) | Pure visible light super-continuum spectrum light source based on semiconductor laser diode pumping | |
| CN113764964A (en) | Design of 1-micron waveband all-fiber femtosecond vortex laser | |
| CN101151577A (en) | Light source apparatus | |
| CN111490439B (en) | High-power high-repetition-frequency pulse-width-adjustable ultrafast laser system | |
| CN111509538A (en) | Gain-related wavelength-controlled and tunable ultrashort pulse laser generation method and device | |
| CN115632299A (en) | High-energy mode-locked fiber pulse laser | |
| CN115296128A (en) | Nanosecond dissipative soliton erbium-doped fiber laser in positive dispersion area | |
| CN113937605A (en) | Multi-parameter tunable femtosecond pulse laser | |
| Wang et al. | Efficient Pulsed Raman Laser with Wavelength above 2.1 μm Pumped by Noise‐Like Pulse | |
| CN216773785U (en) | 2-3 mu m broadband tuned intermediate infrared Raman soliton femtosecond laser | |
| CN215221259U (en) | Sub-hundred femtosecond fiber laser pulse generation device | |
| Li et al. | Sub-picosecond all-fiber chirped-pulse amplification system based on photonic crystal fibers’ spectral broadening and chirped-volume Bragg grating compression | |
| Cao et al. | Multiple dissipative soliton Yb-doped fiber laser without an additional filter | |
| Shamim et al. | Soliton self-frequency shift in a passive silica fiber with conversion efficiency of 84.6% | |
| CN110858698B (en) | Intermediate infrared femtosecond fiber laser light source system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200807 |
|
| RJ01 | Rejection of invention patent application after publication |