ABSTRACT Several approaches for high-resolution laser metrology have been discussed. One approach is to use a multiple-etalon spectrometer, which has two or more etalons with different FSRs. This approache can increase both the resolution at FWHM and the tails, as well as increase the spectrum range of the instrument. With the proper alignment, this multiple etalon configuration can produce an ...

We propose a spectrum analyzer based on the properties of a hologram recorded with the field transmitted by a Fabry-Perot etalon. The spectral response of this holographic Fabry-Perot spectrometer (HFPS) is analytically investigated in the paraxial approximation and compared with a conventional Fabry-Perot etalon of similar characteristics. We demonstrate that the resolving power is twice incre...

A solid Fabry-Perot etalon with a 0.16 A passband was used during the 180 s solar eclipse of 2006 for rapid scans of an emission line of the solar corona. The etalon was a Y-cut lithium niobate wafer coated with reflective and conductive (ITO) layers. Voltage applied perpendicular to the etalon face produced a passband shift of 0.0011 A V(-1). During the eclipse, 18 filtergrams were obtained at...

Jow-Tsong Shy National Tsing Hua University Department of Physics Hsinchu 300, Taiwan Abstract. A laser with its wavelength stabilized to a Fabry-Perot etalon has many industrial applications. An ideal error signal for laser stabilization is the dispersion-like signal generated without wavelength modulation. We present a technique, by which the error signal is generated by the difference of two...

We report on novel three-dimensional tunable Fabry-Perot etalons fabricated by surface micromachining technique. The Fabry-Perot etalons are tuned by rotation or translation movements. For the Fabry-Perot etalon tuned by rotational movement, the Fabry-Perot etalon is integrated with a rotational stage and the effective light path distance is adjusted by rotating the stage. The transmission peak...

The problem of image recognition in the computer vision systems is being studied. results development efficient classification methods, given figure processing speed, based on analysis segment representation structural description form a set descriptors are provided. We propose three versions classifier according to following principles: “object–etalon”, “object descriptor–etalon” and “vector o...

Angular dispersion—whether from prisms, diffraction gratings, or etalons—is well known to result in a pulsefront tilt. Focusing into a tilted etalon, in particular, generates a huge angular dispersion, which is very useful for high-resolution spectrometers and pulse shapers. Here we demonstrate experimentally that, due to the large angular dispersion 3° /nm , the pulse directly out of an etalon...

We built a direct-detection Doppler lidar based on the double-edge molecular technique and made the what we believe to be the first molecular-based wind measurements using the eye-safe 355-nm wavelength. Three etalon bandpasses are obtained with step etalons on a single pair of etalon plates. We eliminate long-term frequency drift of the laser and the capacitively stabilized etalon by locking t...

The linewidth of the BaGa4Se7 (BGSe) optical parametric oscillator (OPO) was narrowed for first time, to best our knowledge, by inserting a Fabry–Perot (FP) etalon into an L-shaped cavity. When 15 mm long BGSe (56.3°, 0°) pumped 1064 nm laser, peak wavelength ∼3529 nm, and 4.53 (3.64 cm-1) under type I phase matching. After 350 µm thick FP etalon, decreased 1.27–2.05 nm. tilt angle 2.34°, 2.05 ...

We demonstrate a multiple-channel, mode-locked, all-solid-state Cr:forsterite laser. By inserting an etalon into the laser cavity, we have generated 12 phase-locked channels with 9-19-ps pulse width near 1230 nm with 280-mW average output power from a single laser oscillator. By tuning the etalon bandwidth we can shorten the pulse width in a specific channel to 1.8 ps.