Description
Littrow Prisms are versatile optical elements that come in various configurations, including uncoated prisms used for dispersing light into a spectrum and aluminum-coated prisms that divert the beam at a 60-degree angle without inverting or reverting the image.
These prisms are commonly used in laser cavities to tune the gain of the cavity to a specific laser line by tilting the prism slightly. They can also be employed as retro-reflecting Brewster prisms, offering flexibility in various optical applications.
14LP-2-1 - Littrow Prisms
Specifications
| Dimension (A - Height): | 22 mm |
|---|---|
| Dimrnsion (B - Length): | 37.9 mm |
| Dimension (C - Width): | 22 mm |
| Material: | BK7 |
| Coating: | Al+SiO2 |
| Dimension Tolerances: | +0.0, -0.2 mm |
| Surface Flatness: | <λ/4 @ 632.8 nm |
| Angle Tolerance: | +/- 10 arcmin |
| Bevel: | 0.4 mm x 45 deg |
| Surface Quality: | 40-20 scratch & dig |
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Features
- Uncoated prisms disperse white light into its spectrum
- Aluminum-coated (B face) prisms divert the beam at a 60-degree angle without image
- inversion or reversion
- Can be used as retro-reflecting Brewster prisms for specific applications
- Useful in laser cavities for tuning the gain to a specific laser line
- Standard BK7 material with high precision dimension tolerances
- Bevel size of 0.4 mm x 45 degrees
- Surface quality of 40-20 scratch & dig
- Excellent surface flatness (<λ/4 @ 632.8 nm)
Applications
- Spectroscopy and light dispersion experiments
- Laser cavities and cavity tuning applications
- Optical setups requiring specific beam direction and angle control
- Research and development in photonics and laser technology
- Laboratory and educational demonstrations
Frequently Asked Questions
What are Littrow prisms used for?
Littrow prisms are used in laser cavities where the wavelength of the return beam can be selected by tilting the prism slightly. In this way, the gain of the cavity can be tuned to a specific laser line.
What is the difference between coated and uncoated Littrow prisms?
The uncoated Littrow prism can disperse white light into its spectrum, while the coated Littrow prism diverts the beam at a 60-degree angle without inverting or reversing the image.
Can Littrow prisms be used as retro-reflecting Brewster prisms?
Yes, Littrow prisms can also be used as retro-reflecting Brewster prisms, as shown in the picture. They are positioned so that the beam which enters the front side of the prism suffers Brewster angle and falls normal to the flat surface and is reflected back along the same path.
What are the standard specifications of Littrow prisms?
The standard specifications of Littrow prisms include material BK7, dimension tolerances of +0.0, −0.2 mm, surface flatness of <λ/4 @ 632.8 nm, angle tolerance of +/- 10 arcmin, bevel of 0.4 mm × 45 deg, and surface quality of 40-20 scratch & dig.
What related products and accessories are available for Littrow prisms?
Related products and accessories for Littrow prisms include Prism/Optics Mount, Universal Prism/Optics Mount, Two Angular Fine Adjustment Mounts, Three Angle Prism/Beamsplitter Table, Tilt/Rotation Stage, and Roll & Pitch Tilt Platform.
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