Construction and Characterization of a Pump Source for a Microchip Laser for Space Applications

Couto, Bruno; Gordo, Paulo; Amorim, António

doi:10.5220/0007400602130219

Cited by 2 publications

(3 citation statements)

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“…The first design is based on previous works [7][8][9]. The first part of the work allowed comparisons between different configurations of laser cavities.…”

Section: Design Of Movable Cavitiesmentioning

confidence: 99%

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Breadboard of Microchip and Avalanche Photodiode in Linear and Geiger Mode for LiDAR Applications

Sousa

Pinto

Couto

et al. 2023

J. Phys.: Conf. Ser.

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This paper reports the implementation of two critical technologies used in LiDARs: 1) A microchip Q-switched laser breadboard and 2) breadboard of an Indium gallium arsenide avalanche photodiode working at 300 K with high reverse polarization voltages. Microchip Q-switched lasers are small solid state back pumped lasers, that can generate high energy short pulses. The implemented breadboard used an Erbium and Ytterbium co doped phosphate glass, a COMALO crystal with 98% (initial transparency) and an output coupler of 98% reflectivity. For the sensor test, a system for the simultaneous operation in vacuum and wide range of temperatures was developed. Avalanche photodiodes are reverse polarized photodiodes with high internal gain, due to their multiple layer composition, capable of building up high values of photocurrent from small optical signals by exploiting the avalanche breakdown effects. The test avalanche photodetector was assembled to be operated in two modes: Linear and Geiger mode, to achieve this behavior, a transimpedance amplifier circuit was implemented. These two technologies are critical for mobile LiDAR applications, due to its low mass and high efficiency. The paper describes the breadboard implementation method and sensor characterization at low temperature and high voltage (beyond breakdown voltage).

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“…The first design is based on previous works [7][8][9]. The first part of the work allowed comparisons between different configurations of laser cavities.…”

Section: Design Of Movable Cavitiesmentioning

confidence: 99%

“…CAD designs of the heating system for the substrate (left), the clamps for the cavity components (right). These assemble will then interface with a pumping system described in [7]. The active medium used had a 1 mm thickness.…”

Section: 2mentioning

confidence: 99%

Breadboard of Microchip and Avalanche Photodiode in Linear and Geiger Mode for LiDAR Applications

Sousa

Pinto

Couto

et al. 2023

J. Phys.: Conf. Ser.

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show abstract

“…The first setup is based on previous works [22][23][24]. It allowed comparisons between different configurations of laser cavities.…”

Section: Design Of Movable Cavitiesmentioning

confidence: 99%

Breadboard of Microchip Laser and Avalanche Photodiode in Geiger and Linear Mode for LiDAR Applications

et al. 2023

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This paper reports the implementation of two critical technologies used in light detection and ranging for space applications: (1) a microchip Q-switched laser breadboard; (2) a breadboard of an indium gallium arsenide avalanche photodiode working at 292 K with high reverse polarization voltages. Microchip Q-switched lasers are small solid-state back-pumped lasers that can generate high-energy short pulses. The implemented breadboard used an erbium and ytterbium co-doped phosphate glass, a Co:Spinel crystal with 98% initial transparency, and an output coupler with 98% reflectivity. For the sensor test, a system for simultaneous operation in vacuum and a wide range of temperatures was developed. Avalanche photodiodes are reverse-polarized photodiodes with high internal gain due to their multiple layer composition, capable of building up high values of photocurrent from small optical signals by exploiting the avalanche breakdown effects. The test avalanche photodetector was assembled to be operated in two modes: linear and Geiger mode. The produced photocurrent was measured by using: (1) a passive quenching circuit; (2) a transimpedance amplifier circuit. These two technologies are important for mobile light detection and ranging applications due to their low mass and high efficiencies. The paper describes the breadboard’s implementation methods and sensor characterization at low and room temperatures with high bias voltages (beyond breakdown voltage).

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Construction and Characterization of a Pump Source for a Microchip Laser for Space Applications

Cited by 2 publications

References 0 publications

Breadboard of Microchip and Avalanche Photodiode in Linear and Geiger Mode for LiDAR Applications

Breadboard of Microchip and Avalanche Photodiode in Linear and Geiger Mode for LiDAR Applications

Breadboard of Microchip Laser and Avalanche Photodiode in Geiger and Linear Mode for LiDAR Applications

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