منابع مشابه
Intracavity Adaptive Optics
A major consideration in most laser resonator designs for high power is to obtain the maximum far field irradiance on a target. Various design approaches have emerged in recent years to optimize the far-field irradiance by utilizing different resonator concepts for the purpose of obtaining the best mode control and near field beam quality. The different concepts utilize annular and compacted ga...
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The effect of intracavity electromagnetically induced transparency (EIT) on the properties of optical resonators and active laser devices is discussed theoretically. Pronounced frequency pulling and cavity-linewidth narrowing are predicted. The EIT effect can be used to reduce classical and quantum-phase noise of the beat note of an optical oscillator substantially. Fundamental limits of this s...
متن کاملIntracavity Laser Absorption Spectroscopy
continued on page 4 continued on page 4 Theodor Hänsch makes a time measurement. Introduction Absorption spectroscopy is one of the oldest scientific methods for studying atomic and molecular structure. It is also one of the most powerful research tools for providing information about the world around us. One important application is ultrasensitive trace gas analysis, which is used in many area...
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A 54-year-old man presented with jaundice and an elevated serum bilirubin level of 11.86mg/dL after radiofrequency ablation of hepatic metastases from rectal carcinoma. A high-grade stenosis at the common bile duct (CBD) was diagnosed on endoscopic retrograde cholangiography (ERC), and computed tomography showed a 7-cm intrahepatic biloma compressing the CBD (●" Fig.1). A subsequent attempt to ...
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scopic ultrasound−assisted rendezvous procedures has been reported previously in patients with obstructive chronic pan− creatitis [1 ± 5]. However, there have been no reports describing the use of this tech− nique in patients with normal pancreatic duct dimensions. We present two patients, a 42−year−old woman with a history of recurrent acute pancreatitis and a tight, inaccessible pan− creatic ...
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ژورنال
عنوان ژورنال: Endoscopy
سال: 2021
ISSN: 0013-726X,1438-8812
DOI: 10.1055/a-1346-7555