CN218123955U

CN218123955U - Purple light laser with light wave capable of being continuously adjusted

Info

Publication number: CN218123955U
Application number: CN202222233590.5U
Authority: CN
Inventors: 刘承勇; 唐卫民
Original assignee: Fuzhou Zifeng Photoelectric Science & Technology Co ltd
Current assignee: Fuzhou Zifeng Photoelectric Science & Technology Co ltd
Priority date: 2022-08-24
Filing date: 2022-08-24
Publication date: 2022-12-23
Anticipated expiration: 2032-08-24

Abstract

The utility model discloses a but purple light laser of light wave continuous regulation relates to purple light laser technical field, including pumping source, titanium precious stone crystal, high reflectivity fiber bragg grating, the frequency doubling crystal of LACOB, the light filter that connects gradually, the pumping source is used for producing laser output, the titanium precious stone crystal is used for producing the fundamental frequency light of 750nm ~ 850nm wavelength, high reflectivity fiber bragg grating is used for choosing the fundamental frequency light of specific wavelength, the frequency doubling crystal of LACOB is used for doubling of frequency to the fundamental frequency light, the light filter is used for filtering fundamental frequency light. The utility model discloses can realize adjusting the wavelength of purple light wave, the purple light wave of appointed wavelength (400 nm ~ 425nm scope) is exported, can adjust laser for narrow pulse width, high peak power's laser output to can protect the laser instrument not damaged.

Description

Purple light laser with light wave capable of being continuously adjusted

Technical Field

The utility model relates to a purple light laser technical field, more specifically the utility model relates to a purple light laser that light wave continuously adjustable is related to that says so.

Background

In recent years, with the continuous development of laser in many application fields such as transportation, measurement, medical treatment, national defense, industrial and agricultural fields, the development of special laser wavelength has attracted more and more interest. These special laser wavelengths can be generated by new laser working substances, or by nonlinear optical frequency conversion of gases or crystalline materials. The wavelength range of the purple light is 400 nm-435 nm, has important function in the medical field, and can be used for killing virus, bacteria and the like. At present, most of ultraviolet lasers are semiconductor lasers, and due to the limitation of laser emission mechanisms and laser material performances, the output wavelength of the ultraviolet lasers is mostly fixed wavelength and cannot be tuned randomly, so that the practical application of the ultraviolet lasers is greatly limited.

Therefore, how to use the violet laser to adjust the wavelength of the violet light wave is a problem that needs to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a purple light laser that light wave can be adjusted in succession.

In order to realize the purpose, the utility model adopts the following technical scheme:

the ultraviolet laser with the continuously adjustable light waves comprises a pumping source, a titanium sapphire crystal, a high-reflectivity fiber Bragg grating, a LaCOB frequency doubling crystal and an optical filter, wherein the pumping source, the titanium sapphire crystal, the high-reflectivity fiber Bragg grating, the LaCOB frequency doubling crystal and the optical filter are sequentially connected, the pumping source is used for generating laser output, the titanium sapphire crystal is used for generating fundamental frequency light with the wavelength of 750nm to 850nm, the high-reflectivity fiber Bragg grating is used for selecting the fundamental frequency light with the specific wavelength, the LaCOB frequency doubling crystal is used for doubling the fundamental frequency light, and the optical filter is used for filtering the fundamental frequency light.

Optionally, the pump source is a 532nm pulse laser.

Optionally, the central wavelength of the high-reflectivity fiber bragg grating is adjustable, and is used for selecting the wavelength.

Optionally, the preparation method of the labob frequency doubling crystal comprises: processing the LaCOB crystal along an XYZ main plane, polishing an XZ plane, and increasing the reflection wavelength of 750 nm-850 nm laser and the reflection wavelength of 375 nm-425 nm laser on an incident plane of the LaCOB frequency doubling crystal; and anti-reflection lasers with the wavelength of 375 nm-425 nm and high reflection lasers with the wavelength of 750 nm-850 nm are arranged on the emergent surface of the LacOB frequency doubling crystal.

Optionally, after the LaCOB frequency doubling crystal doubles the frequency of the fundamental frequency light, the laser wavelength range is 375nm to 425nm.

Optionally, the optical filter filters 750nm to 850nm fundamental frequency light emitted by the LaCOB frequency doubling crystal, and only 375nm to 425nm laser is obtained.

Optionally, the laser module further comprises a Q-switching element, which is located between the high-reflectivity fiber bragg grating and the LaCOB frequency doubling crystal, and is used for switching the laser to a laser output with a narrow pulse width and a high peak power.

Optionally, the Q-switched component is one of an electro-optical Q-switched switch, a mechanical Q-switched switch, and an acousto-optical Q-switched switch.

Optionally, the laser further comprises an isolator positioned between the pump source and the titanium sapphire crystal and used for isolating feedback light of the laser.

According to the above technical scheme, the utility model provides a purple light laser ware that light wave continuously regulated compares with prior art, has following beneficial effect:

(1) The utility model discloses can realize adjusting the wavelength of purple light wave, output the purple light wave of appointed wavelength (400 nm ~ 425nm scope).

(2) The utility model discloses set up the transfer Q component between high reflectivity optic fibre bragg grating and the LacOB doubling crystal, can adjust laser for the laser output of narrow pulse width, high peak power.

(3) The utility model discloses set up the isolator between pumping source and titanium precious stone crystal, kept apart the feedback light of laser instrument, can protect the laser instrument not damaged.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural diagram of an embodiment of the present invention;

fig. 3 is a schematic structural diagram of another embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The embodiment of the utility model discloses but light wave continuous regulation's violet laser, see figure 1, including the pumping source, titanium precious stone crystal, high reflectivity fiber bragg grating, the LACOB frequency doubling crystal, the light filter that connect gradually, the pumping source is used for producing laser output, the titanium precious stone crystal is used for producing the fundamental frequency light of 750nm ~ 850nm wavelength, high reflectivity fiber bragg grating is used for choosing the fundamental frequency light of specific wavelength, the LACOB frequency doubling crystal is used for doubling of frequency to the fundamental frequency light, the light filter is used for filtering fundamental frequency light.

In the device of the present invention, laser light is first generated by a pump source. In one embodiment, the pump source adopts a 532nm pulse laser for generating laser light with the wavelength of 532nm, the operation mode is pulse operation, the polarization direction is horizontal polarization, and the beam quality factor is close to 1.

The high-reflectivity fiber Bragg grating is used for selecting the wavelength, the center wavelength of the high-reflectivity fiber Bragg grating is adjustable, and further the continuous adjustment of the light wave can be realized.

Use the LacOB doubling crystal to carry out the doubling of frequency to fundamental frequency light (750 nm ~ 850 nm), the laser wavelength range is 375nm ~ 425nm after the doubling of frequency, and the wavelength range of purple light is 400nm ~ 435nm, consequently, the utility model discloses the purple light beam of 400nm ~ 425nm scope can be exported to the device to the wavelength is adjustable. The preparation method of the LaCOB frequency doubling crystal comprises the following steps: processing the LaCOB crystal along an XYZ main plane, polishing an XZ plane, and increasing the reflection wavelength of 750 nm-850 nm laser and the reflection wavelength of 375 nm-425 nm laser on an incident plane of the LaCOB frequency doubling crystal; and the laser with the wavelength of 375 nm-425 nm and the laser with the high reflection wavelength of 750 nm-850 nm are transmitted to the emergent surface of the LacOB frequency doubling crystal.

And filtering 750 nm-850 nm fundamental frequency light emitted by the LacOB frequency doubling crystal by using an optical filter, and then only obtaining 375 nm-425 nm laser, thereby avoiding the fundamental frequency light from influencing the finally output purple light.

In another embodiment, the violet laser further comprises a Q-switching element, see fig. 2, located between the high reflectivity fiber bragg grating and the labb frequency doubling crystal, for squeezing the laser pulse width to tune the laser to a narrow pulse width, high peak power laser output. In a specific implementation case, the Q-switching element may be an electro-optical Q-switching switch, a mechanical Q-switching switch, an acousto-optical Q-switching switch, or the like.

When laser is used as a light source for irradiation, a beam of feedback light is usually formed, and if the feedback light is not absorbed or guided out, the feedback light returns to the laser light source along the original path, which causes instability of the laser light and even affects the service life of the laser light source. The higher the power of the laser light source, the greater the influence of the feedback light on the laser light source chip. In order to reduce the influence of the feedback light on the laser light source chip, in another embodiment, the violet laser is further provided with an isolator, see fig. 3, between the pump source and the titanium sapphire crystal for isolating the feedback light of the laser.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The ultraviolet laser with the optical wave capable of being continuously adjusted is characterized by comprising a pumping source, a titanium sapphire crystal, a high-reflectivity fiber Bragg grating, a LaCOB frequency doubling crystal and an optical filter which are sequentially connected, wherein the pumping source is used for generating laser output, the titanium sapphire crystal is used for generating fundamental frequency light with the wavelength of 750 nm-850 nm, the high-reflectivity fiber Bragg grating is used for selecting fundamental frequency light with a specific wavelength, the LaCOB frequency doubling crystal is used for frequency doubling of the fundamental frequency light, and the optical filter is used for filtering the fundamental frequency light.

2. The ultraviolet laser with continuously adjustable optical waves as claimed in claim 1, characterized in that the pump source is a 532nm pulse laser.

3. The ultraviolet laser with continuously adjustable optical wave according to claim 1, wherein the center wavelength of the high-reflectivity fiber bragg grating is adjustable for wavelength selection.

4. The violet laser device with continuously adjustable optical waves according to claim 1, wherein the preparation method of the LacOB frequency doubling crystal comprises: processing the LaCOB crystal along an XYZ main plane, polishing an XZ plane, and increasing the reflection wavelength of 750 nm-850 nm laser and the reflection wavelength of 375 nm-425 nm laser on an incident plane of the LaCOB frequency doubling crystal; and the laser with the wavelength of 375 nm-425 nm and the laser with the high reflection wavelength of 750 nm-850 nm are transmitted to the emergent surface of the LacOB frequency doubling crystal.

5. The ultraviolet laser with continuously adjustable light waves according to claim 4, wherein the laser wavelength range of the LacOB frequency doubling crystal is 375nm to 425nm after frequency doubling of fundamental frequency light.

6. The violet laser with continuously adjustable optical waves as claimed in claim 5, wherein the optical filter filters the fundamental frequency light of 750nm to 850nm emitted from the LacOB frequency doubling crystal, so as to obtain only 375nm to 425nm laser light.

7. The continuous wavelength tunable violet laser of claim 1, further comprising a Q-tuning element between the high reflectivity fiber bragg grating and the labb frequency doubling crystal for tuning the laser to a narrow pulse width, high peak power laser output.

8. The ultraviolet laser of claim 7, wherein the Q-switching element is one of an electro-optical Q-switching switch, a mechanical Q-switching switch, and an acousto-optical Q-switching switch.

9. The violet laser with continuously adjustable optical waves according to claim 1, further comprising an isolator between the pump source and the titanium sapphire crystal for isolating the feedback light of the laser.