Biophotonics
Aligning and centering lenses for cementing or positioning in an optical system poses different challenges depending on the final precision requirements and the methods used during alignment. This... Tuesday, February 23, 2010 VIEW PDF >>
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Fiber
The Jones matrix (JM) or linear transfer function (TF) of a fiber-coupled component, when measured as a function of frequency, contains all of the information required to predict final component... Thursday, February 11, 2010 VIEW PDF >>
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The fundamental methods of encoding digital information onto an optical carrier are identical to the methods that have been developed and are widely used in the RF and wireless world. The only... Friday, January 08, 2010 VIEW PDF >>
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Imaging & Sensing
Spectrum Detector’s pyroelectric equipment will accurately measure low-level optical power signals as long as the appropriate voltage measurement device is used. This note helps users choose the... Friday, February 19, 2010 VIEW PDF >>
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To find the noise equivalent power (NEP), the noise floor of a pyroelectric detector, the detector responsivity at a specified frequency and the detector voltage noise at the same frequency must be... Friday, February 19, 2010 VIEW PDF >>
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Any measurement instrument has a set of available ranges to use. With instruments that measure voltage, current, or resistance directly, those ranges are easy to understand and easy to implement.... Friday, February 19, 2010 VIEW PDF >>
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The Golay Cell is slightly more sensitive, it has a larger sensing area, a fixed window, it has a slow response time, is physically large and requires AC voltage for operation. The Golay Cell is “one... Friday, February 19, 2010 VIEW PDF >>
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Lasers & Laser Systems
Aligning and centering lenses for cementing or positioning in an optical system poses different challenges depending on the final precision requirements and the methods used during alignment. This... Tuesday, February 23, 2010 VIEW PDF >>
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This article provides an introduction to high-power diode laser technology and its use in cladding. In particular, it compares the capabilities and characteristics of diode lasers with
traditional... Tuesday, February 23, 2010 VIEW PDF >>
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Spectrum Detector’s pyroelectric equipment will accurately measure low-level optical power signals as long as the appropriate voltage measurement device is used. This note helps users choose the... Friday, February 19, 2010 VIEW PDF >>
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The Jones matrix (JM) or linear transfer function (TF) of a fiber-coupled component, when measured as a function of frequency, contains all of the information required to predict final component... Thursday, February 11, 2010 VIEW PDF >>
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Optics & Optical Coatings
The 1x140 actuator Deformable Mirror (DM) was developed for use in laser pulse shaping applications in which the DM is used to modify the phase of the spectral components of the laser pulse to... Thursday, February 11, 2010 VIEW PDF >>
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Originally introduced in the 1950s as a concept for improving astronomical imaging by correcting atmospheric aberration, it took nearly two decades for adaptive optics (AO) technology to catch up... Thursday, February 11, 2010 VIEW PDF >>
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Test, Measurement & Positioning
Aligning and centering lenses for cementing or positioning in an optical system poses different challenges depending on the final precision requirements and the methods used during alignment. This... Tuesday, February 23, 2010 VIEW PDF >>
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Spectrum Detector’s pyroelectric equipment will accurately measure low-level optical power signals as long as the appropriate voltage measurement device is used. This note helps users choose the... Friday, February 19, 2010 VIEW PDF >>
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All Spectrum Detector sensors have responsivity in Volts per Watt. When using a sensor with an oscilloscope, the power can be obtained by dividing the peak to peak voltage by the responsivity. When... Friday, February 19, 2010 VIEW PDF >>
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To find the noise equivalent power (NEP), the noise floor of a pyroelectric detector, the detector responsivity at a specified frequency and the detector voltage noise at the same frequency must be... Friday, February 19, 2010 VIEW PDF >>
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