The coupling-wave equations of photorefractive ware mixing processen in-cluding two-and four-wave mixing are expressed as an unified matrix equation in the un-d
A universal spectral modulation sensor with low cost,stable,reliable and accurate performances is presented.The optical measuring device using a universal spect
A new setup of measuring temperature is developed,which the probe is a micro-power consumptive one with CMOS circuit and is driven by optical power.For transmit