When a beam of infrared light strikes their ultra-thin lens—barely thicker than a red blood cell—it emerges on the other side ...

Abstract: We could demonstrate a 2.0-μm wavelength superstructure grating active DBR laser with stable single mode operation and small fluctuations of light intensity 2.5 dB across a whole tuning ...

It is shown that the wavelength converter has strong influence on the intensity noise of the converted channel. Ways of improving the noise performance of the wavelength converter are discussed.