Room temperature input characteristics

Figure 6.18 The room temperature input characteristics (Vjf versus Ig) of the 3.38 mm x 3.39 mm 4H-SIC BJT.

Laser action without any visible degradation was obtained in the InGaN/GaN MQW heterostmctures up to T = 585 K. The laser spectra at low / xc consist of one very narrow line with the lowest FWHM of 0.04 nm. All lasers had well pronounced threshold input-output characteristics. The external differential quantum efficiency of the laser operating at 452 nm for TE polarisation amounts to the value of 77 = 3%. The maximum total energy and power per pulse from both facets were 300 nJ and 40 W, correspondingly, at room temperature for lias = 452 nm. 

Input electric current is introduced to the heater through certain pads to generate heat. Another option is through pads that have compensation resistors whose characteristics resemble those of the heater. Figure 5 shows the sensor s typical output. It describes the thermopiles output voltage difference as a function of gas flow velocity. This output is a result of an experiment where nitrogen gas flow in the range of 0-1,000 standard cubic centimeters per minute at room temperature was introduced. 

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