100µJ-level single frequency linearly-polarized nanosecond pulsed laser at 775 nm (Conference Presentation)

Wei Shi; Qiang Fang; Jingli Fan; Xuelong Cui; Zhuo Zhang; Jinhui Li; Guoqing Zhou

doi:10.1117/12.2251664

21 April 2017 100μJ-level single frequency linearly-polarized nanosecond pulsed laser at 775 nm (Conference Presentation)

Wei Shi, Qiang Fang, Jingli Fan, Xuelong Cui, Zhuo Zhang, Jinhui Li, Guoqing Zhou

Author Affiliations +

Proceedings Volume 10088, Nonlinear Frequency Generation and Conversion: Materials and Devices XVI; 1008806 (2017) https://doi.org/10.1117/12.2251664
Event: SPIE LASE, 2017, San Francisco, California, United States

Abstract

We report a single frequency, linearly polarized, near diffraction-limited, pulsed laser source at 775 nm by frequency doubling a single frequency nanosecond pulsed all fiber based master oscillator-power amplifier, seeded by a fiber coupled semiconductor DFB laser diode at 1550 nm. The laser diode was driven by a pulsed laser driver to generate ~ 5 ns laser pulses at 260 Hz repetition rate with ~ 50 pJ pulse energy. The pulse energy was boosted to ~ 200 μJ using two stages of core-pumped fiber amplifiers and two stages of cladding-pumped fiber amplifiers. The multi-stage synchronous pulse pumping technique was adopted in the four stages of fiber amplifiers to mitigate the ASE. The frequency doubling is implemented in a single pass configuration using a periodically poled lithium niobate (PPLN) crystal. The crystal is 3 mm long, 1.4 mm wide, 1 mm thick, with a 19.36 μm domain period chosen for quasi-phase matching at 33°C. It was AR coated at both 1550 nm and 775 nm. The maximum pulse energy of ~ 97 μJ was achieved when ~ 189 μJ fundamental laser was launched. The corresponding conversion efficiency is about 51.3%. The pulse duration was measured to be 4.8 ns. So the peak power of the generated 775 nm laser pulses reached ~20 kW. To the best of our knowledge, this is the first demonstration of a 100 μJ-level, tens of kilowatts-peak-power-level single frequency linearly polarized 775 nm laser based on the frequency doubling of the fiber lasers.

Conference Presentation

Citation Download Citation

Wei Shi, Qiang Fang, Jingli Fan, Xuelong Cui, Zhuo Zhang, Jinhui Li, and Guoqing Zhou "100μJ-level single frequency linearly-polarized nanosecond pulsed laser at 775 nm (Conference Presentation)", Proc. SPIE 10088, Nonlinear Frequency Generation and Conversion: Materials and Devices XVI, 1008806 (21 April 2017); https://doi.org/10.1117/12.2251664

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
PRESENTATION

WATCH
PRESENTATION SAVE TO MY LIBRARY

GET CITATION

KEYWORDS

Pulsed laser operation

Semiconductor lasers

Fiber lasers

Fiber amplifiers

Second-harmonic generation

Crystals

Fiber coupled lasers

Show All Keywords

Keywords/Phrases

Search In:

Publication Years