Keithley Introduces Flexible, Configurable Laser Diode Test Systems with Improved Performance and Cost.Business Editors CLEVELAND--(BUSINESS WIRE)--March 31, 2003 Keithley Instruments Keithley Instruments (NYSE: KEI) is a measurement and instrument company headquartered in Solon, Ohio. Keithley develops, manufactures, markets and sells highly accurate instruments and data acquisition products, as well as complete system solutions for high-volume production , Inc. (NYSE NYSE See: New York Stock Exchange :KEI) has introduced fully customizable test system kits for light-current-voltage (LIV) characterization of laser diodes A semiconductor-based laser used to generate analog signals or digital pulses for transmission through optical fibers. Both laser diodes and LEDs (light-emitting diodes) are used for this purpose, but the laser diode generates a smaller beam that is easier to couple with the smaller core and assembled laser diode modules (LDMs). In the System 25, Keithley takes advantage of its proven LIV measuring instruments, combines them with unique accessories and cables, and supplies the complete package for less than individual components. Unlike "all-in-one" solutions, System 25 provides customers with the ability to choose only the features and performance they need. Moreover, System 25 kits reduce the time and cost of integrating measurement components into a production test system, and allow unmatched speed and measurement precision. The Keithley System 25 provides up to 5A laser drive current, precision voltage measurements Voltage measurement Determination of the difference in electrostatic potential between two points. The unit of voltage in the International System of Units (SI) is the volt, defined as the potential difference between two points of a conducting wire carrying a , two channels of photodetection, selectable photodiode A light sensor (photodetector) that allows current to flow in one direction from one side to the other when it absorbs photons (light). The more light, the more the current. Used to detect light pulses in optical fibers and other light-sensitive applications, it works the opposite of a detector types, optional laser diode mount, and up to two temperature controllers for laser cooling Laser cooling Reducing the thermal motion of atoms with the force exerted by a laser beam. Typically, such cooling is used to reduce the temperature of a gas of atoms, or the velocity spread of atoms in an atomic beam. , all in an easy-to-assemble kit. The simple ordering process gives purchasers full flexibility in selecting only essential system components, thereby avoiding the cost of unnecessary items. Still, the System 25 can be easily modified as test needs change. It reduces the cost of testing for laser diode manufacturers, telecommunication system OEMs, and contract manufacturers, and lowers test system costs for integrators. Application Background. Laser diodes capabilities and applications have grown beyond those originally found in fiberoptic telecommunications systems (e.g., transmitter and pump lasers A laser used as the pump for an optical amplifier or other laser. See EDFA and laser. ). Now, applications include optical storage devices (based on blue laser technology), defense electronic systems, industrial printing, and a wide array of other uses. As laser diode capabilities have expanded, so have testing needs. The Keithley System 25 has the flexibility to keep up with these changing needs. All laser diodes, including edge emitters, vertical cavity surface emitting lasers (VCSELs), and tunable lasers, to name just a few, must undergo LIV testing. The test system sweeps a forward current through the laser diode while measuring the voltage across the device and the amount of light (optical power) being emitted. Typically, collected data are displayed as a series of LIV characteristic curves. These curves can be used in laser diode R&D and by production test engineers to review device parameters that determine if a laser diode or LDM LDM Logical Disk Manager LDM Local Data Manager LDM Logical Data Model LDM Last Days Ministries LDM Lorenzo de' Medici School (Florence, Italy and Austin, TX) LDM Limited Distance Modem LDM Long Distance Modem is suitable for higher level assembly. In production facilities, these tests may be performed anywhere from incoming inspection to finished LDMs mounted in higher level assemblies. Product Details. The Keithley System 25 was designed to simplify and reduce the cost of creating and using LIV test systems. It eliminates the need to purchase system components separately, which may include a source-measure unit, temperature controller, integrating sphere, photodiode detector, current meter an instrument for measuring the velocity, force, etc., of currents. See also: Current , laser diode mount, plus cabling and ancillary hardware. A System 25 is easy to order and assemble, but provides the greatest flexibility of any LIV test system available. A system can be specified in any of 144 combinations that use Keithley Series 2400 SourceMeter(R) Instruments, Model 2502 Fiber Alignment Photodiode Meters, Model 2510-AT Autotuning TEC controllers, Model 2500INT Integrating Spheres, and Model 85xx Laser Diode Mounts. These combinations are selected based on the application: general purpose laser diodes, transmitter/pump lasers, or high power pump lasers. For LDMs and laser diodes in cooled mounts, one or two TEC (thermoelectric ther·mo·e·lec·tric also ther·mo·e·lec·tri·cal adj. Characteristic of, resulting from, or using electrical phenomena occurring in conjunction with a flow of heat. cooler) controllers can be specified for the System 25. Typically, one Model 2510-AT will be used to control an internal TEC device; a second Model 2510-AT can be added to allow for precise control of ambient test temperature using a fixture mounted TEC. The Model 2500INT two-inch integrating sphere can be specified with either silicon, germanium germanium (jərmā`nēəm) [from Germany], semimetallic chemical element; symbol Ge; at. no. 32; at. wt. 72.59; m.p. 937.4°C;; b.p. 2,830°C;; sp. gr. 5.323 at 25°C;; valence +2 or +4. , or cooled InGaAs photodetectors, depending on the wavelength response needed. For laser diodes packaged in the common 14-pin butterfly package or DIL DIL - Dual In-Line Package package, a Keithley Model 85xx Laser Diode Mount can be used for easy connection of the device under test to the test equipment. The Model 8544-TEC mount has a built-in TEC cooler for ambient temperature Outside temperature at any given altitude, preferably expressed in degrees centigrade. control. Customized variations of the System 25 are also available by contacting a local Keithley sales representative or the factory at the address listed below. Price and Availability. System 25 shipments are available four weeks ARO. Pricing starts at $8,500 per system. For More Information. For more information on the System 25 or any of Keithley's Optoelectronic Test Solutions, contact the company at:
Telephone: 888-534-8453
440-248-0400
FAX: 440-248-6168
E-mail: product_info@keithley.com
Internet: www.keithley.com
Address: Keithley Instruments, Inc.
28775 Aurora Road
Cleveland, OH 44139-1891
About Keithley Instruments. Keithley Instruments, Inc. provides optical and electrical measurement solutions from DC to RF (radio frequency) to the wireless, semiconductor, optoelectronics, and other electronics manufacturing This article presents a typical manufacturing process of an electronic assembly. Component manufacturing Components such as resistors, capacitors and integrated circuits are generally made by specialized contractors. industries. Engineers and scientists around the world use Keithley's advanced hardware and software for process monitoring, production test, and basic research. Products and company names listed are trademarks or trade names of their respective companies. To download hi-res image: http://www.ggcomm.com/KEI_Images/System25.jpg |
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