The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
VCSEL performance will be reviewed. A careful design of cavity structure, as well as precise control in the epitaxial growth enables us to achieve a record power conversion efficiency of 62% in the 1060nm VCSELs.
High output power and low noise performances of CSG-DR-LD have been investigated. Kink-free fiber output power > 60 mW over C-band with high SMSR have been demonstrated. Measured phase noise is lower than 170 kHz, exhibiting excellent noise properties as a monolithic and single stripe tunable LD. These characteristics reveal that CSG-DR-LD is a promising light source for the future digital coherent...
A high-efficiency four-stage class-E Doherty power amplifier for W-CDMA base stations has been developed. Its final stage amplifier, the symmetrical Doherty amplifier using an internally class-E matched GaN packaged device, achieves 15 dB gain and 58.4% CW drain efficiency at 6 dB output back-off from 170 W (52.3 dBm) saturated power. The four-stage 60 dB-gain amplifier, including an output isolator,...
We report the performance of a V-band 5-stage high power amplifier MMIC using a millimeter-wave 0.1 mum GaAs pHEMT. It has demonstrated that an output power of 28.8 dBm (759 mW) at 1 dB compression point with 17.8 dB power gain and 14.2% PAE at 59 GHz. And it delivers an output power of 28.9 dBm (776 mW) at a saturation point. These results represent, to the best of our knowledge, the highest output...
The magnetooptic recording characteristics of three types of DyFeCo films with a quadrilayer structure were measured using three recording methods: optical modulation, magnetic field modulation and the laser-off method. In the laser-off method, the laser power was lowered only while the magnetic field was changing. The transition metal (TM)-rich medium had the best carrier-to-noise (C/N) ratio when...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.