CN1455481A - Self frequency-doubling blue laser of laser diode pumping made in neodymium-doped gadolinium aluminium borate crystal - Google Patents
Self frequency-doubling blue laser of laser diode pumping made in neodymium-doped gadolinium aluminium borate crystal Download PDFInfo
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- CN1455481A CN1455481A CN 02118770 CN02118770A CN1455481A CN 1455481 A CN1455481 A CN 1455481A CN 02118770 CN02118770 CN 02118770 CN 02118770 A CN02118770 A CN 02118770A CN 1455481 A CN1455481 A CN 1455481A
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Abstract
The laser generating 440nm blue light disclosed in the invention includes crystal of aluminum gadolinium borate with neodymium being adulterated (Nd3+: GdAl3 (BO3) 4, NGAB as short form) as the self double-frequency working substance, laser diodes (LD) as the pump and the resonant cavity composed of Nd3+: GdAl3 (BO3) 4 crystal and a output mirror. The laser has features of simple structure, small size, fastness and durability, and feasible cost. The laser can be widely utilized in areas of high-density data storage, color printing and submarine communication etc.
Description
Laser diode-pumped self frequency-doubling blue laser with neodymium-doped gadolinium aluminium borate crystal is made belongs to laser technology field, particularly relates to the design of all solid state self-frequency-doubling laser in the Laser Devices.
With the laser diode-pumped self frequency-doubling blue laser that neodymium-doped gadolinium aluminium borate crystal is made, frequency multiplication is a kind of method that changes the laser beam output wavelength of often using in the laser technology.It adopts a special nonlinear optical crystal usually, places the laser beam front to change the laser beam output wavelength.Laser generation and two kinds of technology of frequency multiplication effect being concentrated on the same crystal, obtain self-frequency-doubling laser output, is the target that scientists is pursued for a long time.
People such as sixties Johnson are mixing Tm
3+LiNbO
3On the same crystal, realized the self-frequency-doubling laser output of 1853nm, but conversion efficiency only reaches 10 to 927nm
-6The order of magnitude (L.F.Johnsonand A.A.Ballman, J.Appl.Phys., 40 (1969) 297).People such as sieve degree of abiding by in 1989 work out the Nd of high conversion efficiency
3+: YAl
3(BO
3)
4(being called for short NYAB) crystal, green self-frequency-doubling laser (Luo Zundu (Luo Zundu), the Jiang Aidong (Jiang Aidong) of acquisition 532nm, Huang Yichuan (Huang Yichuan), Qiu Minwang (Qiu Minwang), Chinese Phys.Lett., 6 (1989) 440).But because the crystal mass problem that the crystal self-defect causes does not have practical application so far.
GdAl
3(BO
3)
4(being called for short GAB) is a kind of non-linear optical crystal material, and it belongs to trigonal system, has R32 space group structure (A.A.Ballman, Am.Mineral, 47 (1962) 1380), and its character is similar to YAl
3(BO
3)
4(being called for short YAB).The GdAl of neodymium-doped
3(BO
3)
4Crystal can be used as a kind of self-frequency doubling laser crystal material, obtains the green self-frequency-doubling laser output of 1060 → 530nm, and laser output energy is 1.55mJ (Qiu Minwang etc., quantum journal, 17 (2000) 3,231～236).But up to now, Shang Weiyou is to adopt the report that obtains the laser of blue laser from the frequency multiplication mode.
With the laser diode-pumped self frequency-doubling blue laser that neodymium-doped gadolinium aluminium borate crystal is made, its purpose just is to develop a kind of employing LD pumping of high conversion efficiency, with the GdAl of neodymium-doped
3(BO
3)
4Crystal is an operation material, can produce all solid state from the frequency multiplication miniature laser of self frequency-doubling blue laser output.
All solid state self-frequency-doubling laser mainly is made up of operation material, pumping source and optical resonator three parts, in addition, also comprises some other additional devices such as laser pump cavity and Laser Power Devices.Wherein operation material is the basis of whole self-frequency-doubling laser, relies on its active ions to produce laser, relies on its host crystal to realize from frequency multiplication.And pumping source mainly works to provide excitation energy, and optical resonator is used for amplifying laser output energy.We can say to produce a self-frequency-doubling laser, at first will find the self-frequency doubling laser crystal that can produce corresponding output wavelength, it is the key point of whole laser, and other parts of laser are just mated according to the character of operation material.
Gadolinium aluminium borate crystal (the Nd of neodymium-doped
3+: GdAl
3(BO
3)
4, be called for short NGAB), be a kind of novel self-frequency doubling laser crystal material of succeeding in developing in the recent period, it belongs to trigonal system, and space group is R32, Nd
3+As dopant ion, replace Gd
3+Case, its concentration is between 1at%～20at%.Its character is very similar to Nd
3+: YAl
3(BO
3)
4Crystal.It can produce the existing report of green laser output of 530nm as self-frequency doubling laser crystal.We find its emission transition cross section σ at the 880nm place in the process of its spectral quality of research
EmBe 0.86 * 10
-19Cm
2, and Nd
3+: YAl
3(BO
3)
4Crystal is at the emission transition cross section σ at 1060nm place
EmBe 1.0 * 10
-19Cm
2, both are very close, and all the other character of NGAB and NYAB are all very similar.So Nd
3+: GdAl
3(BO
3)
4Crystal can be used as a kind of novel self frequency-doubling blue laser crystal material, and the acquisition wavelength is the blue laser output about 440nm, thereby obtains practical application.
As the important component part of self-frequency-doubling laser, pumping source also is absolutely necessary.It provides energy, makes active ions in the crystal from the ground state transition to excitation state, by radiation transistion, turns back to final state from excitation state, and launches the laser of respective wavelength then.The present invention adopts LD as pumping source, and pump mode can adopt side or end pumping.Compare with the lamp pumping, the LD pumping is easy to change emission wavelength with thermal tuning, and the absorption peak of itself and active ions is matched, and the mould coupling effectively and the pump power density height.Particularly the LD pumping has very strong emission peak at 808nm wavelength place, can with the active ions Nd in the NGAB crystal
3+The absworption peak strong at the 810nm place matches, and greatly improved pumping efficiency.LD has become developing direction from now on as the pumping source of solid state laser.
As another important component part of self-frequency-doubling laser, optical resonator is used to make the laser of generation to vibrate therein, just exports when reaching certain energy, promptly is used for the amplification of laser energy.The present invention has adopted laser crystal and outgoing mirror to constitute resonant cavity.Wherein the NGAB crystal is processed into bar-shaped or lath-shaped, on the end face of pump light incident direction, pump light 808nm is plated anti-reflection film, laser oscillation wavelength 440nm and 880nm are then plated the film that is all-trans; On the output end face of NGAB crystal, oscillation wavelength 440nm and 880nm are plated anti-reflection film; Outgoing mirror then to wavelength be the transmitance of 440nm light between 5～40%, the light of 880nm then is all-trans.
With the laser diode-pumped self frequency-doubling blue laser that neodymium-doped gadolinium aluminium borate crystal is made, the mould coupling between LD and laserresonator realizes with lens, and the LD pump light is coupled in the working-laser material with high as far as possible efficient.
Design more than adopting, with the laser diode-pumped self frequency-doubling blue laser that neodymium-doped gadolinium aluminium borate crystal is made, can obtain wavelength is the blue laser output of 440nm.This laser is expected to be used widely in all many-sides such as high density data storage, colored printing, water-bed communications.
Making with neodymium-doped gadolinium aluminium borate crystal, is shown in the accompanying drawing with the structural representation of the self frequency-doubling blue laser of laser diode end-face pump, and wherein (1) is the LD pumping source, (2) be condenser lens, (3) be the NGAB crystal, (4) are outgoing mirror, and (5) are blue laser output.
With the laser diode-pumped self frequency-doubling blue laser that neodymium-doped gadolinium aluminium borate crystal is made, realize that best way of the present invention is: working-laser material adopts neodymium-doped gadolinium aluminium borate crystal, and pumping source is a laser diode; Resonant cavity is made up of neodymium-doped gadolinium aluminium borate crystal and outgoing mirror, wherein is processed into bar-shaped or lath-shaped to the NGAB crystal, on the end face of pump light incident direction, to the light of 808nm wavelength plating anti-reflection film, laser oscillation wavelength 440nm and 880nm are then plated the film that is all-trans; On the output end face of NGAB crystal, oscillation wavelength 440nm and 880nm are plated anti-reflection film; Outgoing mirror then to wavelength be the transmitance of 440nm light between 5～40%, the light of 880nm then is all-trans.
Claims (7)
1. the laser diode-pumped self frequency-doubling blue laser made from neodymium-doped gadolinium aluminium borate crystal, form by operation material, pumping source, resonant cavity, laser pump cavity and Laser Power Devices, it is characterized in that: operation material is a neodymium-doped gadolinium aluminium borate crystal, pumping source is a laser diode, and resonant cavity is made up of crystal and outgoing mirror.
2. the laser diode-pumped self frequency-doubling blue laser made from neodymium-doped gadolinium aluminium borate crystal as claimed in claim 1, it is characterized in that: described operation material is Nd
3+: GdAl
3(BO
3)
4(being called for short NGAB) crystal, this crystal belongs to trigonal system, and space group is R32, mixes Nd
3+Ion concentration is between 1at%～20at%.
3. the laser diode-pumped self frequency-doubling blue laser made from neodymium-doped gadolinium aluminium borate crystal as claimed in claim 1 or 2, it is characterized in that: described operation material is processed into bar-shaped or lath-shaped.
4. the laser diode-pumped self frequency-doubling blue laser made from neodymium-doped gadolinium aluminium borate crystal as claimed in claim 1 is characterized in that: described pumping source adopts the mode of side or end pumping.
5. the laser diode-pumped self frequency-doubling blue laser made from neodymium-doped gadolinium aluminium borate crystal as claimed in claim 1 is characterized in that: the Nd in the described resonant cavity
3+: GdAl
3(BO
3)
4(NGAB) crystal plates anti-reflection film, laser oscillation wavelength 440nm and 880nm is then plated the film that is all-trans pump light 808nm on the end face of pump light incident direction; At Nd
3+: GdAl
3(BO
3)
4(NGAB) on the output end face of crystal oscillation wavelength 440nm and 880nm are plated anti-reflection film; Outgoing mirror then to wavelength be the transmitance of 440nm light between 5～40%, the light of 880nm then is all-trans.
6. as claim 1 and the 5 described laser diode-pumped self frequency-doubling blue lasers made from neodymium-doped gadolinium aluminium borate crystal, it is characterized in that: between laser diode and laserresonator, realize the mould coupling with lens.
7. the application of the laser diode-pumped self frequency-doubling blue laser made from neodymium-doped gadolinium aluminium borate crystal of a claim 1, it is characterized in that: this laser application is in aspects such as high density data storage, colored printing, water-bed communications.
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|---|---|---|---|
| CN 02118770 CN1455481A (en) | 2002-05-03 | 2002-05-03 | Self frequency-doubling blue laser of laser diode pumping made in neodymium-doped gadolinium aluminium borate crystal |
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| CN 02118770 CN1455481A (en) | 2002-05-03 | 2002-05-03 | Self frequency-doubling blue laser of laser diode pumping made in neodymium-doped gadolinium aluminium borate crystal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100401599C (en) * | 2004-04-20 | 2008-07-09 | 中国科学院福建物质结构研究所 | Frequency multiplication ultraviolet solid laser applying non-linear laser crystal |
| CN111101198A (en) * | 2020-01-06 | 2020-05-05 | 山东大学 | Neodymium-doped zinc bismuth borate self-frequency-doubling crystal material, cut type, preparation method and application thereof |
-
2002
- 2002-05-03 CN CN 02118770 patent/CN1455481A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100401599C (en) * | 2004-04-20 | 2008-07-09 | 中国科学院福建物质结构研究所 | Frequency multiplication ultraviolet solid laser applying non-linear laser crystal |
| CN111101198A (en) * | 2020-01-06 | 2020-05-05 | 山东大学 | Neodymium-doped zinc bismuth borate self-frequency-doubling crystal material, cut type, preparation method and application thereof |
| CN111101198B (en) * | 2020-01-06 | 2021-07-20 | 山东大学 | Neodymium-doped zinc bismuth borate self-frequency-doubling crystal material, cut type, preparation method and application thereof |
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