Abstract
We demonstrate a high peak power and high burst energy linear-polarization, narrowband, GHz-adjustable burst-mode fiber-bulk hybrid laser with central wavelength of 1064 nm and its second-harmonic generation. The active modulated burst-mode seed provides the tunability of temporal parameters and the pre-compensation of burst envelope distortion. Three-stage polarization maintained fiber amplifier cascading bulk amplifier promote the burst energy to 4 mJ at a burst duration of 100 ns and intra-burst duty of 50%. To the best of our knowledge, this is the highest reported output energy of burst-mode fiber-bulk hybrid laser with ∼ hundred nanoseconds burst duration. Also, the pre-compensation for rectangular burst envelope is investigated by iteration method. Type I, non-critical phase matching lithium borate (LBO) is employed for second-harmonic generation and 1.8 mJ burst energy is achieved, corresponding to a conversion efficiency of 45%. The 3 dB spectral width of green light at maximal burst energy is 90 pm. The immediate application of this laser system is the generation of high peak power frequency-adaptive microwave.
Highlights
High peak power and high pulse energy burst-mode pulse lasers distinctively contain a bunch of high repetition rate pulses with durations ranging from the ultrafast regime (
4 mJ Rectangular- Envelope GHz-Adjustable could improve the ranging precision in LIDAR application [8], [9] and realize the simultaneous measurement of multi-physical-parameters in turbulent flows [10], [11]. Another promising application is the generation of high power pulsed agile microwave by means of linear-mode photoconductive semiconductor switch devices (PCSS), where high value current could be generated with the similar temporal shapes of the incident burst-mode laser under a DC-biased voltage [12]
The details of intra-burst pulses shape are shown in Fig. 2(b), the pulse shape is sinusoid-like with high repetition rate of 1.0 GHz and pulse duration of 500 ps
Summary
High peak power and high pulse energy burst-mode pulse lasers distinctively contain a bunch of high repetition rate pulses with durations ranging from the ultrafast regime (
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