Temperature dependence of the 106-µm stimulated emission cross section of neodymium in YAG and in GSGG

Rapaport, Alexandra; Zhao, Shengzhi; Xiao, Guohua; Howard, Andrew; Bass, Michael

doi:10.1364/ao.41.007052

Cited by 60 publications

(37 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Figure 4 shows the extraction test results measured in our laboratory. Since the stimulated cross section for Nd:YAG laser is reported to be medium temperature dependent, (7) our extraction results reflect this expected effect in that slightly lower efficiency appears at maximum pumping level. Similar energy extraction efficiency has been reported by Rutherford, (6) et.…”

Section: Methodssupporting

confidence: 68%

Compact and efficient DPSS laser using diamond-cooled technology

Chou

Wang

Hasson

2004

High-Power Laser Ablation V

View full text Add to dashboard Cite

In this paper, we summarize the performance of a diamond cooled diode pumped solid state (DPSS) Nd:YAG laser developed by Textron Systems Corporation (TCS). Over 50% intrinsic extraction efficiency at 50-Watts average power, equivalent to volumetric power extraction of 2000 W/cc, has been experimentally demonstrated. Beam quality (BQ) of less than 1.1 XDL has been measured in an oscillator configuration with the laser operating in TEM 00 mode. With a simple passive thermal lens correction, BQ of less than 1.5 XDL was obtained from an oscillator amplifier arrangement at specific pump rates up to 1600 W/cc and 600 W/cc, respectively. By using an intra-cavity acousto-optic modulator, Q-switched laser pulses as short as 6 ns were obtained from the oscillator. This concept is amenable to scaling up to very high power levels. A conceptual design, using our validated database, for a 100-kW class laser is also presented.

show abstract

Section: Methodssupporting

confidence: 68%

Compact and efficient DPSS laser using diamond-cooled technology

Chou

Wang

Hasson

2004

High-Power Laser Ablation V

View full text Add to dashboard Cite

show abstract

“…Therefore, in order to store a maximum of energy in the Nd:YAG rod, we chose to fix the concentration to 0.6% and to pump it in a QCW regime. Contrary to its excited state lifetime, the emission cross section of Nd:YAG at =1064 nm-hereafter labeled as  em (1064nm)-decreased as the temperature increased [35,36]. A simple empiric law made it possible to infer the evolution of the emission cross section versus the temperature (Equ.…”

Section: Nd:yag Crystal Amplification Stagementioning

confidence: 99%

Compact nanosecond laser system for the ignition of aeronautic combustion engines

Amiard-Hudebine

Tison

Freysz

2016

Journal of Applied Physics

View full text Add to dashboard Cite

We have studied and developed a compact nanosecond laser system dedicated to the ignition of aeronautic combustion engines. This system is based on a nanosecond microchip laser delivering 6 μJ nanosecond pulses, which are amplified in two successive stages. The first stage is based on an Ytterbium doped fiber amplifier (YDFA) working in a quasi-continuous-wave (QCW) regime. Pumped at 1 kHz repetition rate, it delivers TEM00 and linearly polarized nanosecond pulses centered at 1064 nm with energies up to 350 μJ. These results are in very good agreement with the model we specially designed for a pulsed QCW pump regime. The second amplification stage is based on a compact Nd:YAG double-pass amplifier pumped by a 400 W peak power QCW diode centered at λ = 808 nm and coupled to a 800 μm core multimode fiber. At 10 Hz repetition rate, this system amplifies the pulse delivered by the YDFA up to 11 mJ while preserving its beam profile, polarization ratio, and pulse duration. Finally, we demonstrate that this compact nanosecond system can ignite an experimental combustion chamber.

show abstract

“…[16][17][18][19][20] The temperature dependence of a small signal gain in Nd:YAG in the range of 250 K -500 K and of the stimulated emission cross section of the 1.064-m Nd 3+ laser transition in YAG in the range of temperatures between −70°C to 70°C have been reported. 21,22 The stimulated emission cross section for 4 F 3/2 → 4 I 11/2 transition of an active ion has been determined from the spectral properties of the intensity of emission. 22 This is called the Fuchtbauer-Ladenburg ͑F-L͒ method.…”

Section: Introductionmentioning

confidence: 99%

“…21,22 The stimulated emission cross section for 4 F 3/2 → 4 I 11/2 transition of an active ion has been determined from the spectral properties of the intensity of emission. 22 This is called the Fuchtbauer-Ladenburg ͑F-L͒ method. The diode laser pumped laser action 23,24 is another method for the determination of the cross section and is free from the complications involved in spectroscopic methods.…”

Section: Introductionmentioning

confidence: 99%

High data rate laser transmitter based on a diode double end-pumped Nd:YAG laser with linearly polarized output for free space laser communication

et al. 2008

View full text Add to dashboard Cite

Optically pumped solid-state lasers with Nd:YAG may have to operate over a wide range of temperatures. We designed and fabricated a diode double end-pumped Nd:YAG laser for free space laser communication. Various laser beam parameters have been characterized for the same application. The temperature dependence of the effective stimulated emission cross section for 4 F 3/2 → 4 I 11/2 transition and fractional thermal loading of Nd:YAG are determined using a planar resonator with two collimated and focused pump beams from fiber-array package laser diodes at 808 nm. The pump power-induced thermal lensing is used to stabilize the cavity. The diode double end-pumped Nd:YAG laser possesses an extremely good beam profile that exactly matches the theoretical Gaussian intensity distribution up to a diode current of 30 A. After that the ellipticity slightly increases, indicating deviation from the circular symmetry of beam, which may be due to the thermally induced birefringence of the Nd:YAG crystal offered to the polarized laser beam. The thermal lens focal length decreases with an increase in the absorbed pump power, similar to the case of a lamp pumped Nd:YAG laser and a diode pumped Nd: YVO 4 laser. All the results indicate that the laser beam characteristics are useful for high data rate free space laser communication links.

show abstract

Temperature dependence of the 106-µm stimulated emission cross section of neodymium in YAG and in GSGG

Abstract: A linear temperature dependence between -70 degrees C and +70 degrees C is reported for the peak stimulated emission cross section of Nd3+ ions in both yttrium aluminum garnet (YAG) and gadolinium scandium gallium garnet (GSGG).

Cited by 60 publications

References 16 publications

Compact and efficient DPSS laser using diamond-cooled technology

Compact and efficient DPSS laser using diamond-cooled technology

Compact nanosecond laser system for the ignition of aeronautic combustion engines

High data rate laser transmitter based on a diode double end-pumped Nd:YAG laser with linearly polarized output for free space laser communication

Contact Info

Product

Resources

About