Yb and Er -codoped gadolinium silicate laser crystal and preparation method therefor

Abstract

The invention discloses an ytterbium-erbium doping gadolinium silicate crystal and preparing method, which is characterized by the following: the laser single-crystal structure formula is Ybx, Ery:Gd2SiO5, wherein x is 0.01-0.5; y is 0.001-0.15; the crystal adopts flux method growth; the Yb,Er:Gd2SiO5 crystal possesses high-sound acoustic phonon energy (1000cm-1) with large crystal field splitting, 0.86*10-20cm-1 transmitting cross-section of 1.55 mum band and 7ms fluorescent lifetime, which improves Er3+ luminous efficiency.

Description

technical field

[0001] The invention relates to a laser crystal, in particular to a ytterbium-erbium co-doped gadolinium silicate laser crystal with a light emission wavelength of 1.55 μm and a preparation method thereof. The structural formula of the laser crystal is Yb x , Ery:Gd 2 SiO 5 , which is suitable for InGaAs diode pumping. Background technique

[0002] Er 3+ (Erbium ion) laser in the 1.55μm band has become one of the current academic hotspots. Currently Er 3+ Usually, an InGaAs diode with an emission wavelength around 980nm is used as the pump source, because Er 3+ The absorption coefficient in this band is small, and Yb is used 3+ (ytterbium ion) as Er 3+ sensitizer, Yb 3+ The absorption cross-section is large near 980nm, making the Yb 3+ to Er 3+ There is a higher energy transfer efficiency, so the introduction of Yb 3+ to sensitize Er 3+ will greatly improve Er 3+ Absorption of pump light. Er 3+ Lasers can be widely used in military, optical com...

Examples

preparation example Construction

[0019] Yb according to the present invention, Er:Gd 2 SiO 5 The preparation method of laser single crystal comprises the following steps:

[0020] ① Raw material formula

[0021] The initial raw material is Yb 2 o 3 , Er 2 o 3 , Gd 2 o 3 and SiO 2 , the raw materials are compounded according to the molar ratio x:y:1:1, where the value range of x is 0.01~0.5; the value range of y is 0.001~0.15;

[0022] ② After selecting the proportions x and y according to the above-mentioned formula, weigh each raw material, and after each raw material is fully mixed, press it into a block on a hydraulic press to form a block;

[0023] ③Then put the block into the crucible and grow Yb, Er:Gd by melt method 2 SiO 5 single crystal.

[0024] Examples of enumeration are as follows:

Embodiment 1

[0026] Will Yb 2 o 3 , Er 2 o 3 , Gd 2 o 3 and SiO 2 High-purity raw materials are weighed according to x=0.01, y=0.001. After mixing evenly, press it into a block on a hydraulic press, put it in an iridium crucible, and use the pulling method to grow the crystal, and the seed crystal is Gd 2 SiO 5 Single crystal rod, crystal growth is carried out in high-purity Ar atmosphere.

Embodiment 2

[0028] Will Yb 2 o 3 , Er 2 o 3 , Gd 2 o 3 and SiO 2 High-purity raw materials are weighed according to x=0.05, y=0.003. After mixing evenly, press it into a block on a hydraulic press, put it in an iridium crucible, and use the pulling method to grow the crystal, and the seed crystal is Gd 2 SiO 5 Single crystal rod, crystal growth is carried out in high-purity Ar atmosphere.

technical field

[0001] The invention relates to a laser crystal, in particular to a ytterbium-erbium co-doped gadolinium silicate laser crystal with a light emission wavelength of 1.55 μm and a preparation method thereof. The structural formula of the laser crystal is Yb x , Ery:Gd 2 SiO 5 , which is suitable for InGaAs diode pumping. Background technique

[0002] Er 3+ (Erbium ion) laser in the 1.55μm band has become one of the current academic hotspots. Currently Er 3+ Usually, an InGaAs diode with an emission wavelength around 980nm is used as the pump source, because Er 3+ The absorption coefficient in this band is small, and Yb is used 3+ (ytterbium ion) as Er 3+ sensitizer, Yb 3+ The absorption cross-section is large near 980nm, making the Yb 3+ to Er 3+ There is a higher energy transfer efficiency, so the introduction of Yb 3+ to sensitize Er 3+ will greatly improve Er 3+ Absorption of pump light. Er 3+ Lasers can be widely used in military, optical com...

Examples

preparation example Construction

[0019] Yb according to the present invention, Er:Gd 2 SiO 5 The preparation method of laser single crystal comprises the following steps:

[0020] ① Raw material formula

[0021] The initial raw material is Yb 2 o 3 , Er 2 o 3 , Gd 2 o 3 and SiO 2 , the raw materials are compounded according to the molar ratio x:y:1:1, where the value range of x is 0.01~0.5; the value range of y is 0.001~0.15;

[0022] ② After selecting the proportions x and y according to the above-mentioned formula, weigh each raw material, and after each raw material is fully mixed, press it into a block on a hydraulic press to form a block;

[0023] ③Then put the block into the crucible and grow Yb, Er:Gd by melt method 2 SiO 5 single crystal.

[0024] Examples of enumeration are as follows:

Embodiment 1

[0026] Will Yb 2 o 3 , Er 2 o 3 , Gd 2 o 3 and SiO 2 High-purity raw materials are weighed according to x=0.01, y=0.001. After mixing evenly, press it into a block on a hydraulic press, put it in an iridium crucible, and use the pulling method to grow the crystal, and the seed crystal is Gd 2 SiO 5 Single crystal rod, crystal growth is carried out in high-purity Ar atmosphere.

Embodiment 2

[0028] Will Yb 2 o 3 , Er 2 o 3 , Gd 2 o 3 and SiO 2 High-purity raw materials are weighed according to x=0.05, y=0.003. After mixing evenly, press it into a block on a hydraulic press, put it in an iridium crucible, and use the pulling method to grow the crystal, and the seed crystal is Gd 2 SiO 5 Single crystal rod, crystal growth is carried out in high-purity Ar atmosphere.

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