About PPLN Crystal
About PPLN Crystal
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MgO:PPLN SHG crystals may be fabricated with QPM grating durations well suited for a wide array of commercially offered pump laser wavelengths from 976 nm to 2100 nm, letting technology of frequency doubled mild between 488nm and 1050nm.
Laser induced damage (LIDT) may originate from randomly distributed intrinsic faults/impurities or laser induced ionized totally free carriers, which result in products to absorb enter laser Power with worth significantly over that would be expert at decrease depth concentrations and so cause the laser-induced breakdown:
g. in the shape of “grey tracking�? These kinds of phenomena are significantly typical for operation with ultraviolet gentle. Be aware that a gradual degradation can also direct into instant catastrophic problems by means of abnormal warmth technology.
In that way, the processing Price is usually relatively small for fabrication of large quantities, Whilst periodically poled elements are frequently highly-priced when manufactured in modest portions.
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The choice on the most suitable crystal material for a specified software is usually significantly from trivial; it ought to include the thought of many features. One example is, a higher nonlinearity for frequency conversion of ultrashort pulses won't aid When the conversation size is strongly minimal by a considerable group velocity mismatch as well as the low destruction threshold click here limits the relevant optical intensities.
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To allow effective nonlinear wavelength conversion, equally photon Electricity conservation and photon momentum conservation are to be happy concurrently from the nonlinear optical system, as revealed in figure 2. The necessity over the photon momentum conservation is also referred to as “period-matching�?constraint. If such a stage matching affliction isn't content, the produced photons will destructively interfere with one another, restricting the volume of created photons that at last exit the crystal.
For narrowband CW resources our lengthier crystal lengths, at twenty to 40mm, really should give best performance. On the other hand, for pulsed resources, an extended crystal can have a negative outcome Should the pump bandwidth is way broader compared to crystal acceptance bandwidth.
Stage-matching around quite prolonged propagation lengths at infrared wavelengths can be done with our congruently grown PPLN produced from really uniform Z-axis wafers.
Readily available inventory of periodically poled crystals can be offered on quick timescales to promptly meet your application requires, supplying the aptitude to efficiently make laser light-weight in an array of wavelengths.
the chemical longevity; e.g., some crystal materials are hygroscopic, Other people endure chemical adjustments when heated inside a vacuum chamber for application of a dielectric coating
five μm. These crystals are suitable with an array of pump resources, together with femtosecond, picosecond, nanosecond, and constant waves. We sustain a readily available inventory of MgO:PPLN crystals to ensure brief shipping and meet your software requires successfully.
Many other Distinctive periodic sample layouts, such as cascaded, fan-out, and other custom made configurations are also available for specific applications using the CW, ns pulsed and extremely-short ps/fs pulsed laser pumps. Samples of Distinctive QPM buildings are illustrated in determine three