High-efficiency frequency-doubled YSGG:Cr Nd laser with high average output power

1992 ◽  
Author(s):  
V. G. Lyan ◽  
B. A. Mikhailov ◽  
D. A. Nikolaev ◽  
S. K. Pak ◽  
S. I. Khomenko ◽  
...  
Keyword(s):  
Output Power ◽  
Average Output Power ◽  
High Efficiency ◽  
Average Output

Wideband high-efficiency linearized PA design with reduction in memory effects and IMD3

2018 ◽  
Vol 10 (4) ◽  
pp. 391-400 ◽  
Author(s):  
Xuekun Du ◽  
Chang Jiang You ◽  
Yulong Zhao ◽  
Xiang Li ◽  
Mohamed Helaoui ◽  
...  
Keyword(s):  
Output Power ◽  
Average Output Power ◽  
High Efficiency ◽  
Second Harmonic ◽  
Memory Effects ◽  
Third Order ◽  
Average Output ◽  
Power Added Efficiency ◽  
Low Pass ◽  
Intermodulation Distortions

ABSTRACTAn analytical method is proposed to reduce the memory effects and third-order intermodulation distortions for improving the linearity of wideband power amplifier (PA). An excellent linearity can be obtained by reducing the second-harmonic output power levels and reducing the envelope voltage components in the megahertz range. An improved wideband Chebyshev low-pass matching network including the bias network is analyzed and designed to validate the proposed method. The measured results indicate that a wideband high-efficiency linearized PA is realized from 1.35 to 2.45 GHz (fractional bandwidth = 58%) with power added efficiency of 60–78%, power gain of 10.8–12.3 dB, and output power of 40.0–41.2 dBm. For a 20 MHz LTE modulated signal, the adjacent channel leakage ratios (ACLRs) of the proposed PA with digital pre-distortion (DPD) linearization are −55.7 ~ −53.9 dBc across 1.5–2.4 GHz at an average output power of 32.4–33.6 dBm. For a 40 MHz two-carrier LTE modulated signal, the ACLRs of the proposed PA with DPD linearization are −51.1 ~ −48.2 dBc at an average output power of ~30.5 dBm in the frequency range from 1.5 GHz to 2.4 GHz.

scholarly journals Analytical Design Solution for Optimal Matching of Hybrid Continuous Mode Power Amplifiers Suitable for a High-Efficiency Envelope Tracking Operation

Electronics ◽  
2019 ◽  
Vol 8 (6) ◽  
pp. 621
Author(s):  
Tao Cao ◽  
Youjiang Liu ◽  
Wenhua Chen ◽  
Chun Yang ◽  
Jie Zhou
Keyword(s):  
Output Power ◽  
Average Output Power ◽  
High Efficiency ◽  
Average Power ◽  
Experimental System ◽  
Design Solution ◽  
Error Vector Magnitude ◽  
Envelope Tracking ◽  
Average Output ◽  
Power Added Efficiency

An analytical method to design a power amplifier (PA) with an optimized power added efficiency (PAE) trajectory for envelope tracking (ET) architecture is proposed. To obtain feasible matching solutions for high-efficiency performance of the PA in the dynamic supply operation, hybrid continuous modes (HCM) architecture is introduced. The design space for load impedances of the HCM PAs with nonlinear capacitance is deduced mathematically using the device’s embedding transfer network, without the necessity of using load-pull. The proposed design strategy is verified with the implementation of a GaN PA operating over the frequency range of 1.9 GHz to 2.2 GHz with PAE between 67.8% and 72.4% in the 6.7 dB back-off power region of the ET mode. The ET experimental system was set up to evaluate the application of the PA circuit. Measurement results show that the ET PA at 2.1 GHz reaches the efficiency of 61%, 54%, 44% and an error vector magnitude (EVM) of 0.32%, 0.60%, 0.67% at an average output power of 34.4 dBm, 34.2 dBm, 34.1 dBm for 6.7 dB peak-to-average power ratios (PAPR) signals with 5 MHz, 10 MHz, and 20 MHz bandwidths, respectively. Additionally, tested by a 20 MHz bandwidth 16 quadrature amplitude modulation (QAM) signal, 41.8% to 49.2% efficiency of ET PA is achieved at an average output power of 33.5 dBm to 35.1 dBm from 1.9 GHz to 2.2 GHz.

Copper laser with high-average-output power

1995 ◽  
Author(s):  
Nikola V. Sabotinov ◽  
Chris E. Little
Keyword(s):  
Output Power ◽  
Average Output Power ◽  
Average Output

Diode-pumped passively mode-locked Nd:KGd(WO_4)_2 laser with 1-W average output power

2002 ◽  
Vol 27 (16) ◽  
pp. 1478 ◽  
Author(s):  
A. Major ◽  
N. Langford ◽  
T. Graf ◽  
D. Burns ◽  
A. I. Ferguson
Keyword(s):  
Output Power ◽  
Average Output Power ◽  
Average Output ◽  
Diode Pumped

SM green fiber laser operating in CW and QCW regimes and producing over 550W of average output power

2014 ◽  
Author(s):  
Valentin Gapontsev ◽  
Alexey Avdokhin ◽  
Pankaj Kadwani ◽  
Igor Samartsev ◽  
Nikolai Platonov ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Output Power ◽  
Average Output Power ◽  
Average Output

Linearly polarized Q-switched pulse Yb fiber laser with average output power over 10 W

2009 ◽  
Vol 6 (6) ◽  
pp. 461-464 ◽  
Author(s):  
Y.X. Wang ◽  
D.Z. Yang ◽  
P.P. Jiang ◽  
Y.H. Shen
Keyword(s):  
Fiber Laser ◽  
Output Power ◽  
Average Output Power ◽  
Average Output ◽  
Linearly Polarized

scholarly journals High power mid-infrared supercontinuum generation in a single-mode ZBLAN fiber with up to 218 W average output power

2014 ◽  
Vol 22 (20) ◽  
pp. 24384 ◽  
Author(s):  
Kun Liu ◽  
Jiang Liu ◽  
Hongxing Shi ◽  
Fangzhou Tan ◽  
Pu Wang
Keyword(s):  
Output Power ◽  
High Power ◽  
Average Output Power ◽  
Single Mode ◽  
Supercontinuum Generation ◽  
Average Output ◽  
Mid Infrared
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