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This investigation experimentally demonstrates a 40 GHz phase shifter based on a semiconductor laser. The phase shift is achieved by adjusting the bias current and wavelength detuning. The device has ...
Semiconductor Laser White Noise Suppression by Optical Filtering with Ultra-Narrowband FBG
Semiconductor lasers Fiber Bragg gratings
2015/5/21
The white frequency noise of semiconductor lasers is attenuated significantly by optical filtering with an ultra-narrowband fiber Bragg grating. This noise reduction will improve carrier phase estimat...
Characterization of Semiconductor-Laser Phase Noise with Digital Coherent Receivers
Characterization Semiconductor-Laser Phase Noise Digital Coherent Receivers
2015/5/20
We develop a method of characterizing semiconductor-laser phase noise using a digital coherent receiver. The field spectrum, FM-noise spectrum, and phase-error variance can completely describe phase-n...
Application of microscope thermography in testing temperature distribution in a semiconductor laser
microscope thermography blue lasers semiconductor lasers
2011/5/9
Microscope thermography with the use of thermovision camera with spatial resolution 8 μm was
applied in testing temperature distribution in semiconductor lasers produced on the basis of nitrides.
Th...
Analysis of Nonlinear Optical Effects in Monolithically Integrated FM-Mode-Locked Semiconductor Laser Diodes
Nonlinear Optical Effects Monolithically Integrated FM-Mode-Locked Semiconductor Laser Diodes
2015/7/17
Simulation shows that asymmetric nonlinear optical gain causing the mode instability of mode-locked lasers can be compensated by phase modulation. Mode stabilization was confirmed experimentally using...
Challenge to Organic Semiconductor Laser: Low-Threshold Photopumped Organic Lasers Made of Styryl Benzene Derivatives
Organic semiconductor laser Distributed feedback Distributed Bragg reflector
2009/6/9
Based on our research, we comment on recent progress in organic semiconductor lasers. Styryl benzene derivatives having good gain-narrowing performance are one of promising materials for organic semic...
Study on Small Vibration Sensor by Self-Coupling Effect of Semiconductor Laser
Self-coupling effect Small vibration Sensor
2009/6/1
Small vibration sensors with the laser interferometer have been developed. However, there are some disadvantages, for example, weakness to external vibration, difficulty in optical alignment, and so o...
Optical methods used to optimise semiconductor laser structures with tunnel injection from quantum well to InGaAs/GaAs quantum dots
quantum dots optical properties lasers
2011/5/11
We present the results of optical measurements performed on structures consisting of an InGaAs quantum well (QW), separated by a thin barrier from a layer of self-assembled InGaAs quantum dots (QDs). ...
Thermoreflectance study of temperature distribution on the semiconductor laser mirrors
thermoreflectance semiconductor laser mirrors temperature maps
2011/4/27
In the high-power semiconductor lasers, the surface of the mirror is the key element of the construction, which has the main impact on the reliability and degradation processes. In the case of lasers ...
Properties analysis and solutions of light power equalization for free space communication system using semiconductor laser
light power equalization adaptive power control wireless optical communication
2010/7/16
starting with the light transmission properties in atmosphere, analyzed the characteristics of light power gain for FSO system, the dynamic range of light power gain was also discussed. A innovation p...
Increasing semiconductor laser-optical fiber coupling efficiency by introducing microlens
semiconductor laser optical fiber coupling efficiency microlens
2011/4/25
The efficiency of coupling between semiconductor lasers and single-mode optical fibers can be greatly increased by a microlens of an appropriate focal length being fabricated at the end of the fiber. ...