POC-OC-122468-Barium Nitrate Crystal

  • Transparency range from 350 nm to 1800 nm
  • Raman frequency shift of 1048 cm⁻¹
  • High Raman gain, ideal for nanosecond applications
  • Low absorption and stable properties
  • Custom crystal dimensions and coatings available upon request

Customizable Components Available for This Material to Meet Your Specific Needs!

Barium Nitrate Crystal Material General Description

Barium Nitrate Crystal (Ba(NO₃)₂) is a cubic crystal known for its high Raman gain coefficient, making it one of the most efficient materials for Raman laser applications in nanosecond steady-state regimes. The material exhibits a broad transparency range (350 nm to 1800 nm) and moderate damage thresholds, making it suitable for applications requiring “eye-safe” radiation in the 1.59 µm range. Despite its advantages, its relatively low thermal conductivity (1.17 W·m⁻¹·K⁻¹) and high thermo-optic coefficient (dn/dT = -20 × 10⁻⁶/K) can lead to thermal lensing, requiring careful thermal management during operation. Barium Nitrate Crystal is hygroscopic and should be handled with care.

Barium Nitrate Crystal General Applications and Examples

Barium Nitrate Crystals are used in a range of Raman laser systems. Typical applications include:

  • Raman Lasers: External cavity Raman lasers, especially for systems utilizing Q-switched Nd:YAG lasers.
  • Eye-Safe Lasers: Generation of 1.59 µm radiation aligned with the CO₂ absorption line, suitable for lidar and environmental monitoring.
  • Nanosecond Raman Shifters: Ideal for generating high-power radiation in nanosecond regimes due to its exceptional Raman gain coefficient (47 cm/GW @ 532 nm).

For these applications, the Crystal  high transparency and Raman frequency shift make it an indispensable material for advanced photonics solutions.

Chemical and Structural Properties

Property

Value

Chemical Formula

Ba(NO₃)₂

Crystal Structure

Cubic, P-2₁3

Lattice Parameters

a = b = c = 8.11 Å

Density

3.25 g/cm³

Mohs Hardness

2.5–3

Transparency Range

0.33–1.8 µm

Refractive Index @ 1064 nm

1.5559

Thermal Conductivity

1.17 W·m⁻¹·K⁻¹

Thermal Expansion Coefficient

13 × 10⁻⁶ / K

Thermo-Optic Coefficient (dn/dT)

-20 × 10⁻⁶ / K

Raman Frequency Shift

1048 cm⁻¹

Raman Linewidth

0.4 cm⁻¹

Raman Gain

47 cm/GW @ 532 nm

Laser-Induced Damage Threshold

> 10 J/cm² @ 1064 nm, 10 ns

Optical, Laser and Nonlinear Optical Properties

Optical Property

Value

Raman Frequency Shift

1048 cm⁻¹

Raman Gain

47 cm/GW @ 532 nm, 11 cm/GW @ 1064 nm

Transparency Range

0.33 µm – 1.8 µm

Damage Threshold

10 J/cm² @ 1064 nm, 10 ns

Refractive Index

1.5559 @ 1064 nm

Standard Fabrication Specifications

Optical Property

Value

Raman Frequency Shift

1048 cm⁻¹

Raman Gain

47 cm/GW @ 532 nm, 11 cm/GW @ 1064 nm

Transparency Range

0.33 µm – 1.8 µm

Damage Threshold

10 J/cm² @ 1064 nm, 10 ns

Refractive Index

1.5559 @ 1064 nm

Spectrum Transmission Curve:

The transparency curve for Barium Nitrate Crystals reveals a broad operational range from 350 nm to 1800 nm, ideal for applications in visible and near-infrared wavelengths.

Coating Specification:

 

Coating Type

Range

AR Coating Efficiency

AR Coating

500–700 nm

< 0.2% reflectance

  • Adhesion Test Compliant with MIL-C-675C military standards, an adhesion test involved applying a tape that meets LT-90 specifications onto the lens film layer. The tape was affixed fully and then removed vertically. This procedure was performed three times, resulting in no blistering or peeling.
  • Temperature Test In line with MIL-C-675C specifications, test pieces were subjected to temperatures of -62±1℃ and 71±1℃. After maintaining them at room temperature (16℃~32℃) for two hours, the adhesion test was repeated, confirming no film detachment.
  • Abrasion Resistance Test Conforming to MIL-C-675C and CCC-C-440 standards, the abrasion resistance test involved a gauze tester applying a minimum force of 1.0 lbs (0.45 kg) to the film. This was repeated 25 times with gauze widths of 1/4 inch (6.4mm) and 3/8 inch (9.5mm), ensuring no damage occurred to the film surface.
  • Humidity Test Under MIL-C-675C criteria, the test piece was placed in a controlled temperature and humidity chamber set to 49 ±2℃ and 95%~100% humidity for 24 hours. The film remained intact, with no peeling, scratches, or other defects.
  • Solvent and Cleaning Testing Following MIL-C-675C specifications, test pieces were exposed to room temperature conditions (16℃~32℃) and tested with acetone and alcohol for at least 10 minutes each. After air drying and subsequent cleaning with a cotton cloth soaked in alcohol, the film surface showed no signs of peeling or scratches.
  • Salt Spray Test After 100 hours in a 35°C environment with a 5% saltwater concentration, the film showed no signs of damage.

POC Strength and Capabilities

 

Photonics On Crystals (POC) specializes in the manufacturing and customization of high-quality Barium Nitrate Crystals. With decades of experience in material fabrication, we provide:

  • Expertise in thermal management and optical coatings.
  • Customization services for various dimensions and coatings.
  • High-precision manufacturing processes.
  • Rapid delivery and technical support for specialized applications.

Standard Products

Face Dimensions

Length

Coatings

Price (USD)

5 × 5 mm

15 mm

AR @ 500–700 nm

$870

5 × 5 mm

30 mm

AR @ 500–700 nm

$1050

8 × 8 mm

45 mm

AR @ 500–700 nm

$1240

8 × 8 mm

75 mm

AR @ 500–700 nm

$1410

Custom

Custom

Upon Request

Upon Request