Ophir Photonics (a Newport Corporation brand) is the world leader in the measurement and characterisation of lasers, measuring such parameters as laser power, pulse energy, beam width, M2, divergence, beam stability and many other important qualities. Their brands include; Ophir Power & Energy meters, Spiricon beam profilers, Photon beam profilers and Photon gonimometer based profilers.
A camera-based beam profiler system consists of a camera, profiler software and a beam attenuation accessory. Warsash Scientific offer a broad range of cameras in to cope with wavelengths from 13nm, extreme UV, to 3000µm, in the long infrared. Both USB and FireWire interfaces are available for most wavelength ranges providing flexibility for either laptop or desktop computers.
BeamGage®, the profiling software, comes in three versions: Standard, Professional and Enterprise. Each builds off of the next adding additional capability and flexibility needed for adapting to almost any configuration requirement.
An extensive array of accessories for beam profiling are available, including components for attenuating, filtering, beamsplitting, magnifying, reducing and wavelength conversion. Also for wavelengths from the deep UV to CO2 wavelengths. Most of the components are modular so they can be mixed and matched with each other to solve almost any beam profiling requirement needed.
Because slit scanners measure beams at high powers with little or no attenuation, they are ideal to profile beams used in material processing. Carbon dioxide (CO2) lasers are widely used in materials processing, and have a 10.6 micron wavelength that cannot be profiled with most cameras. Slit scanners, therefore, provide an convenient means of measuring high-resolution CO2 lasers with powers up to and exceeding 1000 watts.
The scanning slit beam profiler moves a narrow slit in front of a photo-detector through the beam under analysis. Light passing through the slit onto the detector creates a photo-induced current in the detector. The slit acts as a physical attenuator in the scanning slit beam profiler, and the amplification gain on the detector can be set to avoid detector saturation for most beam profiling. A digital encoder precisely measures slit position. The photo-induced current is then plotted as a function of slit position to determine a linear profile of the beam. From this linear profile, important spatial information such as beam width, beam position, beam quality, and other characteristics are determined. This technique can accommodate a wide variety of test conditions.[ Send Enquiry ]
The LD 8900HDR Far-Field Profiler uses goniometric methodology to measure true 3-dimensional profiles of optical components with up to 93dB dynamic range. All measurements are taken with the emitting fibre, planar waveguide, laser diode or LED inserted directly into the centre of the instrument's radial measurement area. For optical fibre, the far-field distribution pattern is acquired without bending the fibre. Bending the fibre can cause analysis and reporting inaccuracies. Parameters measured for optical fibre are:
Both the LD 8900 and LD 8900R (wide dynamic range Goniometric Radiometer) provide full 3-dimensional measurements of the far-field pattern in minutes or less, with far better resolution than a CCD
Both models have an angular sampling resolution of 0.055° and a field-of-view of ±72° (144°), and are ideal for characterising the light flux from many sources, including VCSEL
The LD 8900 and the LD 8900R are available with either a silicon or InGaAs detector and have a standard entrance aperture of 2mm, with an optional 10mm entrance aperture for use with larger sources such as LEDs and LD bars. LD 8900 and LD 8900R complete systems include: