Ultra-narrow band diode lasers with arbitrary pulse shape modulation (Conference Presentation)

2017 ◽  
Author(s):  
Aleksandr I. Ryasnyanskiy ◽  
Vadim Smirnov ◽  
Oleksiy Mokhun ◽  
Alexei L. Glebov ◽  
Leonid B. Glebov
Keyword(s):  
Pulse Shape ◽  
Narrow Band ◽  
Diode Lasers ◽  
Shape Modulation

Search for narrow-band-noise modulations of the infrared transmission of blue bronze

2002 ◽  
Vol 12 (9) ◽  
pp. 85-86
Author(s):  
R. C. Rai ◽  
V. A. Bondarenko ◽  
J. W. Brill
Keyword(s):  
Absorption Coefficient ◽  
Narrow Band ◽  
Diode Lasers ◽  
Infrared Transmission ◽  
Narrow Band Noise ◽  
Band Noise ◽  
Tunable Diode Lasers ◽  
Upper Limits ◽  
Blue Bronze

We have searched for narrow-band-noise (NBN) modulations of the infrared transmission in blue bronze, using tunable diode lasers. No modulations were observed, giving an upper limits for NBN changes in the absorption coefficient of $\Delta \alpha_{NBN} < 0.3 $ / cm ($\approx \alpha/2000$). The implication of these results on proposed CDW properties and NBN mechanisms are discussed.

A compact reconfigurable sub-nanosecond pulse generator with pulse-shape modulation

2016 ◽  
Vol 9 (4) ◽  
pp. 741-745
Author(s):  
Arash Valizade ◽  
Pejman Rezaei ◽  
Ali Asghar Orouji
Keyword(s):  
Pulse Shape ◽  
Pulse Width ◽  
Pulse Shaping ◽  
Simple Structure ◽  
Pulse Generator ◽  
Nanosecond Pulse ◽  
Pin Diode ◽  
Nanosecond Pulses ◽  
Shape Selection ◽  
Shape Modulation

A new design of reconfigurable sub-nanosecond pulse generator (PG) with pulse shape selection ability is presented in this paper. Step recovery diode is used as the pulse sharpening device and the pulse shaping circuit consists of a controllable RC differentiator in which a single PIN diode is embedded, which provides two different switchable pulse shaping performances. The realized PG has a compact (10 × 12 mm2) simple structure and is easy to implement while generating Gaussian and monocycle pulses with 510 and 660 ps pulse width, respectively. The proposed pulse shaping method is versatile and can be effectively modified and reconfigured to generate more complicated pulse shapes such as polycycle signals. The measured results reveal that the proposed reconfigurable PG is suitable to be used in systems with pulse shape modulation that require sub-nanosecond pulses at low pulse repetition rates.

A design of UWB reconfigurable pulse transmitter with pulse shape modulation

2016 ◽  
Vol 58 (9) ◽  
pp. 2221-2227 ◽  
Author(s):  
A. Valizade ◽  
P. Rezaei ◽  
A. A. Orouji
Keyword(s):  
Pulse Shape ◽  
Shape Modulation
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