Application Notes

A Survey of Methods Using Balanced Photodetection

 

Application Notes

New Focus balanced photoreceivers are ideal for optical detection applications that require sensitive measurements. This application note focuses on several techniques, divided into three categories: small signal detection in time domain, small signa...

Insights into High-Speed Detectors and High-Frequency Techniques

 

Application Notes

With the advancement of high-transmission-rate systems and short-pulse lasers, many applications now require high time-resolution or equivalently, high frequency-bandwidth optical detection. For example, a high-speed photodetector can measure the fre...

Power Meter Minimum Measurable Power - Technical Note

 

Application Notes

There seems to be some confusion regarding terms such as ‘Resolution’, ‘Noise Level’, ‘Minimum Detectable Power’ or ‘Minimum Measurable Power’ of the device. These terms are all used in conjunction with the detection sensitivity of the instrument.

Measuring Linewidth Source with OMH-6700 - AN16

 

Application Notes

The OMH-6700B series of optical measurement heads measure wavelength to within ±0.5 nm accuracy for the 6730B series and to within ±1 nm for the 6720B series for narrow linewidth sources. Many sources such as LED’s and laser diodes may have wider lin...

Using a Power Wavehead for Emitter Level Screening of High Power Laser Diode Bars - AN32

 

Application Notes

Emitter level screening has been shown to be an effective tool for testing high power laser diode bars and stacks. Measurement of individual emitter output power, wavelength, and polarization purity allow the identification of defective individual em...

Calibration and Traceability of ILX Lightwave Optical Power Meters - AN36

 

Application Notes

Traceability refers to an unbroken chain of calibration transfers from a known standard to the instrument in question. At ILX Lightwave, this chain of traceability begins with the primary cryogenic radiometer standards maintained by the Optical Techn...

Basic Test Methods for Passive Fiber Components - AN18

 

Application Notes

The ever increasing demand for telecommunications bandwidth is driving the market for the components that make up fi ber-optic networks. This article presents basic principles of passive component testing and compares test methods. In particular, the...

Novel Power Meter Design - AN25

 

Application Notes

A new integrating sphere design was developed by ILX Lightwave to reduce the polarization dependent response of their power meter as well as to desensitize the meter to fi ber positioning variations. These changes were welcomed by key component manuf...

Near Field Imaging of a Laser Diode - Application Note 12

 

Application Notes

This note describes the result of an experiment performed on near field imaging of a laser diode emission pattern at the output facet. The purpose of the experiment was to provide a proof-of-concept system for the near field measurement of a high-pow...

Raman Microspectrometer - Application Note 42

 

Application Notes

Raman scattering was discovered by Sir C. V. Raman in the 1920’s. Since then Raman spectroscopy has become one of the most popular analytical techniques. It provides comprehensive information about the vibrational modes of molecules by monitoring mac...
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