LT1000A Laser Transverse-Mode Teaching Instrument
Product: LT1000A laser transverse-mode teaching instrument. External dimensions: 400mm×200mm×190mm. Experimental principle: The cat's-eye cavity-loss adjuster comprises a concave mirror (HR@632.8nm) and a convex lens (AR@632.8nm). The concave mirror has radius of curvature R, the lens has focal length f and their separation is L. When f=R=L, the adjuster is equivalent to a plane mirror; when L<f=R, it is equivalent to a convex mirror; when L>f=R, it is equivalent to a concave mirror. The lens group adjusts resonator loss and changes the losses experienced by different transverse modes, allowing low-loss modes to oscillate while suppressing high-loss modes.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Semi-External-Cavity Helium-Neon Laser Assembly - Center Wavelength | 632.8nm |
| Semi-External-Cavity Helium-Neon Laser Assembly-Gain Tube Length | 250mm |
| Semi-External-Cavity Helium-Neon Laser Assembly-Concave Mirror R | Concave-Mirror (R1m) Output |
| Semi-External-Cavity Helium-Neon Laser Assembly-Capillary Length | 200mm |
| Semi-External-Cavity Helium-Neon Laser Assembly-Capillary Inner Diameter | 2.0mm |
| Semi-External-Cavity Helium-Neon Laser Assembly-Cavity Length | approximately 290mm |
| Output Beam-Expansion Assembly-Concave Lens f | Concave Lens with f=30mm |
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