MgO Doped Periodically-Poled Lithium Niobate

MgO:PPLN material has successfully been used to generate green and blue laser beams with good efficiency. The advantage of the doped material over congruent PPLN is that it is much less susceptible to photorefractive damage. This makes it particularly suitable for applicatons generating visible light in the blue-green spectral range, and for applications where the crystal needs to be operated close to room temperature. Crystal Technology produces a range of such crystals where all the critical manufacturing steps are performed in house. Our growth method is well developed and geared to high volume production thus lowering manufacturing cost and allowing our crystals to be deployed into mass market application such as laser projection displays and other consumer applications. The purity of starting powders and the crystal growth parameters are tightly controlled to ensure consistent quality guaranteeing stable optical properties. Our research has resulted in crystal growth that is guaranteed to avoid photorefractive damage yielding devices with well controlled refractive index and birefringence.

The standard MgO:PPLN parts have 3 periodicities on a chip to allow the user to optimize operating temperature for the device. Both anti-reflection coated as well as uncoated chips are available in three lengths, 1mm, 3mm and 10mm to support both short and long pulsed sources at various power levels. Custom designs are also available.

Applications

• SHG for Green and Blue
• Laser based RGB Displays
• Portable mid-IR generation for optical sensing