نتایج جستجو برای: distributed feedback laser
تعداد نتایج: 586503 فیلتر نتایج به سال:
Nonlinearity difference in the two passbands of a distributed-feedback semiconductor laser amplifier
Abstract The new paradigm of parity-time symmetry in quantum mechanics has readily been applied the field optics with numerous demonstrations exotic properties photonic systems. In this work, we report on implementation single frequency electrically injected distributed feedback (DFB) laser diodes based symmetric dual gratings a standard ridge waveguide configuration. We demonstrate enhanced mo...
A sample grating distributed feedback quantum cascade laser array aim at broad tunability and enhanced side mode suppression ratios is presented. Utilizing a sample grating dependence on emission wavelength and epitaxial side down bonding technique, the array of laser ridges exhibited three separated single mode emissions centered at 4.760, 4.721, and 4.711 μm respectively, in continuous wave a...
An enhanced near-infrared quartz enhanced photoacoustic spectroscopy (QEPAS) sensor for subppm level H2S detection by means of a fiber amplified 1582 nm distributed feedback laser was developed. Experimental studies demonstrated that a H2S detection sensitivity of 142 ppbv can be achieved by the reported power-boosted QEPAS sensor at atmospheric pressure and room temperature. OCIS codes: (280.3...
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