Diamond turning of L-arginine phosphate, a new organic crystal

Journal Article · Sun Oct 15 04:00:00 EDT 1989 · Applied Optics; (USA)

DOI:https://doi.org/10.1364/AO.28.004465· OSTI ID:5369882

Fuchs, B A; Syn, K; Velsko, S P ^[1]

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1. Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550 (US)

We have demonstrated that single point diamond turning can be used to generate high optical quality finished surfaces on a new organic nonlinear crystal, L-arginine phosphate (LAP). The proper choice of cutting conditions can produce surfaces with {lt}5-A rms local roughness. Local softening or melting near the cutting tool tip may play a key role in the machining process by ensuring that material is removed by ductile cutting rather than brittle fracture. At the same time, the low melting temperature of LAP makes lubrication and cooling especially important to prevent extensive melting and tool fouling. In spite of the presence of a weak cleavage plane in LAP, the surface quality is relatively insensitive to crystallographic orientation. Tool wear is apparently negligible, so that surface flatness is governed by the stability of the diamond turning machine. These results suggest that it may be possible to fabricate large aperture LAP harmonic converters for use in inertial confinement fusion lasers.

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5369882
• Journal Information: Applied Optics; (USA), Journal Name: Applied Optics; (USA) Vol. 28:20; ISSN 0003-6935; ISSN APOPA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
AMINO ACIDS
ARGININE
CARBOXYLIC ACIDS
CHEMICAL PROPERTIES
FREQUENCY CONVERTERS
FREQUENCY MIXING
HARMONIC GENERATION
MACHINING
MATERIALS TESTING
MECHANICAL PROPERTIES
NOVA FACILITY
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
SURFACE FINISHING
TESTING