By offering a choice of three resonators, the MK II from Mazak Nissho Iwai (Schaumburg, IL) enables fabricators to select the resonator power most efficient for their business. The engineered 4000W resonator enables high-speed feed rates and the ability to cut mild steel up to one inch thick. The 1500W and 2500W resonators enable fabricators who cut thinner gauges to benefit from lower energy and running costs. Material handling options range from a simple pallet shuttle through the company's Laser CMS (Cyber Manufacturing System). The NC-programmable torch enables automatic setup of cut conditions for virtually any material type, and the modular cutting head enables quick lens changes without re-focusing. An expanded set of subprograms optimizes ramping and piercing speeds for a range of materials. The system is available with a 4- × 8-ft, 5- × 10-ft or 6- × 12-ft bed.
Tube processing system
The Tubematic RC laser cutting system from Trumpf Inc. (Farmington, CT) cuts thin-walled tubes that require a clean cut without deformation. The letters RC—for Round Cut—indicate the special design of the machine as a tube processing system for round pipes only. Tubes of up to 21 feet (standard) or up to 31 feet in length can be processed automatically when delivered from a bundle magazine. The optional catcher unit removes both spatter and fumes given off during the cutting process. The catcher unit also enables the laser to be used at full power for maximum cut speeds.
Telecom imaging camera
The SP-1550M telecom imaging camera from Spiricon Inc. (Logan, UT) incorporates a phosphor with three times the response of the former material, making it more suitable for low-level telecom signals. The camera is used for beam analyzing of NIR telecom devices in the 1460nm to 1625nm range. This includes the output of optical fibers, laser diodes, LEDs and VCSELs. It also profiles NIR lasers such as optical parametric oscillators (OPOs). According to the company, the SP-1550M camera has from two to four times the resolution of either InGaAs or PbSe technology, at four to 12 times less cost.
New ytterbium-doped potassium tungstate lasing materials from Eksma Co. (Vilnius, Lithuania) include Yb:KY.(WO4)2 (Yb:KYW) and Yb:KGd.(WO4)2 (Yb:KGW). Yb3+-doped materials are used in development of all-solid-state lasers operating in the 1-µm range. A Yb:KGW crystal as a gain medium exhibits high slope efficiency with CW laser and diode pumping at around 980 nm. Finished elements of up to 20 × 20 × 60 mm at b-cut orientation can be supplied.
Diffractive variable attenuators
Del Mar Ventures' (San Diego, CA) Diffractive Variable Attenuators for high-power lasers control the power of laser radiation using diffraction gratings. Because phase diffraction gratings do not absorb light, they can be used for high-power laser radiation (CW, pulsed). Variation of grating parameters along the substrate results in variable transmission at a given wavelength. Attenuator manufacture starts from computer design of two-dimensional diffractive gratings using proprietary diffraction optics design software. A master grating mask is created using high-resolution laser photo plotters. The final manufacturing process is accomplished using lithographic methods, including plasma etching. The diffractive attenuators are designed for wavelengths from deep UV through IR. The damage threshold for the high-power attenuators is more than 250W/cm2 in CW and 1000mJ/.cm2 in 10ns pulses.
Collimators and focusers
Edmund Industrial Optics (Barrington, NJ) offers assemblies designed to collimate or focus light exiting an optical fiber. They provide either a collimated beam of a desired diameter or focus the light to a spot. The lenses in the assemblies are diffraction limited. Also, the lenses are antireflection coated to reduce back reflection. The assemblies can be used in pairs to couple the input and output light of optical devices. The effective focal length varies with wavelength, but at 633 nm it is 11.0mm with a clear aperture of 5.5mm, while at 780 nm it is 15.29 mm with a clear aperture of 5.00 mm. The housing diameter is 12 mm ±0.025 mm.
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