Fiber Mode Scrambler for the Subaru Infrared Doppler Instrument (IRD)
نویسندگان
چکیده
منابع مشابه
Single-mode tellurite glass holey fiber with extremely large mode area for infrared nonlinear applications.
We report the fabrication of a large mode area tellurite holey fiber from an extruded preform, with a mode area of 3000microm(2). Robust single-mode guidance at 1.55microm was confirmed by both optical measurement and numerical simulation. The propagation loss was measured as 2.9dB/m at 1.55microm. A broad and flat supercontinuum from 0.9 to 2.5microm with 6mW output was obtained with a 9cm len...
متن کاملDeep Near-Infrared Universe Seen in the Subaru Deep Field
The Subaru Deep Field provides the currently deepest Kselected sample of high-z galaxies (K ′ ∼ 23.5 at 5σ). The SDF counts, colors, and size distributions in the near-infrared bands are carefully compared with pure-luminosity-evolution (PLE) as well as CDM-based hierarchical merging (HM) models. The very flat faint-end slope of the SDF K count indicates that the bulk (more than 90%) of cosmic ...
متن کاملNear-Infrared Fiber Imager for the VLTI
For detection of massive close-in exo-planets around other stars, a contrast of ∼ 0.3% is sufficient and can be achieved with state-of-the-art single-mode fibers as spatial filter. For lower-mass planets, much higher accuracy is neccessary. Apart from the atmosphere, there are several sources of noise which degrade the phase stability of interferometers based on bulk optics by changes in the op...
متن کاملComparison between M-Mode and Doppler echocardiography in diagnosis
Introduction: Patent ductus arteriosus (PDA) is the persistence of a normal fetal structure between left pulmonary artery and descending aorta. Persistence of this fetal structure beyond 10 days of life is considered abnormal. In this study we compared M-Mode and Doppler echocardiography in diagnosis of PDA in children at Aliasghar Hospital in Zahedan and Children hospital in Bandar Abbas for...
متن کاملInfrared Fiber Optics
Infrared (IR) optical fibers may be defined as fiber optics transmitting radiation with wavelengths greater than approximately 2 μm. The first IR fibers were fabricated in the mid-1960’s from chalcogenide glasses such as arsenic trisulfide with losses in excess of 10 dB/m. During the mid-1970’s, the interest in developing an efficient and reliable IR fiber for short-haul applications increased ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Publications of the Astronomical Society of the Pacific
سال: 2018
ISSN: 0004-6280,1538-3873
DOI: 10.1088/1538-3873/aab8d0