Pulsed light power stabilization of a semiconductorlaser using a mixed analog-digital method with anacousto-optic modulator

Laser diode stacks: pulsed light power for nuclear fusion

High Power Laser Science and Engineering ◽

10.1017/hpl.2016.13 ◽

2016 ◽

Vol 4 ◽

Cited By ~ 5

Author(s):

Martin Wölz ◽

Agnieszka Pietrzak ◽

Alex Kindsvater ◽

Jens Meusel ◽

Klaus Stolberg ◽

...

Keyword(s):

Semiconductor Laser ◽

Laser Diode ◽

Inertial Confinement Fusion ◽

Large Scale ◽

Light Output ◽

Production Capacity ◽

Inertial Confinement ◽

Pulsed Light ◽

Light Power ◽

Laser Diode Arrays

Laser drivers are an enabling factor to inertial confinement fusion, because laser diodes must be used instead of flash lamps. We discuss the limitations of laser diode arrays and show what steps the industry is taking. The pump power requirements of large-scale projects such as LIFE or HiPER are within reach of semiconductor laser diode assemblies. Pulsed light output powers per laser bars have been around 300 W per bar, as in the Jenoptik 940 nm bars previously used for pumping the Yb:YAG slabs in the DiPOLE project. By redesigning the semiconductor laser structures 500 W per bar is now commercially available for 808, 880 and 940 nm pump wavelengths. The construction of one inertial fusion power plant will require an amount of semiconductor laser chips in excess of the current annual production by two orders of magnitude. This adds to the engineering task of improving the device characteristics a challenge to production capacity. While the industry benefits from the recent boost in solid-state lighting that acts as a technology driver, cooperation between manufacturers will be imperative, and to this end we propose standardization efforts.

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A Realization of Stabilizing the Output Light Power from a Laser Diode: A Practical Approach

Engineering, Technology & Applied Science Research ◽

10.48084/etasr.4276 ◽

2021 ◽

Vol 11 (4) ◽

pp. 7370-7374

Author(s):

M. T. Chughtai

Keyword(s):

Laser Diode ◽

Temperature Compensation ◽

Laser Diodes ◽

Threshold Current ◽

Temperature Stabilization ◽

Light Power ◽

Compensation Technique ◽

Power Stabilization ◽

Semiconductor Laser Diodes ◽

Full Design

Semiconductor Laser Diodes (LDs) are known for their sensitivity to variation in ambient temperature. With the rise in case temperature the threshold current of the LD increases, causing the output light power to deteriorate drastically. Therefore, it is necessary to stabilize the temperature of the diode. Various approaches could be adopted in this regard. In this paper, an active cooling approach using the temperature compensation technique has been followed and presented in the form of a full design of the circuit according to the various datasheet parameters of the LD and other components. As a result of temperature stabilization, a significant improvement in the output light power stabilization was observed and the results are presented.

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