Thermal-birefringence-induced depolarization in Nd:YAG ceramics.

نویسندگان

  • Ichiro Shoji
  • Yoichi Sato
  • Sunao Kurimura
  • Voicu Lupei
  • Takunori Taira
  • Akio Ikesue
  • Kunio Yoshida
چکیده

The thermal-birefringence effect in Nd(3+) -doped YAG ceramics has been investigated. The amount of depolarization induced by thermal birefringence in Nd:YAG ceramics is nearly the same as that in (111)-cut single crystals at the same Nd(3+) concentration. However, depolarization becomes larger as the Nd(3+) concentration increases, even at the same absorbed pump power.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Compensation of Thermally Induced Birefgingence and Phase Distortions in [100]-cut Nd:yag Crystals

Thermally induced birefringence in laser crystals limits the power and beam quality of high-power solid-state lasers and amplifiers. It is known, that 100-cut Nd:YAG crystals have less thermally induced depolarization that 111-cut ones [1]. Using a scheme with two rods, imaging telescope and a 90° rotator [2] allows to compensate for the depolarization. In contrast to 111-cut rod, pump heating ...

متن کامل

Thermally induced birefringence in Faraday devices made from terbium gallium garnet-polycrystalline ceramics.

We have developed a model that describes thermally induced birefringence in polycrystalline ceramics that are exposed to a magnetic field. Conditions under which traditional compensation techniques (for glass and single crystals) can be effective for ceramics have been found. It is shown that a ceramic is almost equivalent to a [111]-oriented crystal if the ratio of the rod length to the grain ...

متن کامل

Simple method for reducing the depolarization loss resulting from thermally induced birefringence in solid-state lasers.

A simple technique for reducing the loss that is due to depolarization resulting from thermally induced stress birefringence in solid-state lasers is reported. The technique uses a single intracavity quarter-wave plate with its fast or slow axis aligned parallel to the preferred plane of polarization, defined by an intracavity polarizer. This technique has been applied to a diode-bar-pumped Nd:...

متن کامل

Investigation of Thermal Dispersion and Thermally-Induced Birefringence on High-Power Double Clad Yb:Glass Fiber Laser

In this work the effects of heat generation on the modes of Yb:Glass double clad fiber laser were investigated. The thermal dispersion and thermally-induced birefringence were considered when the gain medium becomes an anisotropic medium. The results showed considerable modifications of laser modes profiles, in particular for transfer magnetic (TM) and transfer electric (TE) modes which their p...

متن کامل

Thermal lens compensation of Nd:YAG rod laser using a solid element of negative temperature coefficient of refractive index

In high power solid-state-laser systems, one of the major problems is the thermal effect, which occurs in optically pumped laser materials. Heating of the laser medium causes thermal distortions, leading to degradation of beam quality. The main thermal effects in laser rods are thermally induced birefringence and thermal lensing effects. High efficiency, high power and good output beam quality ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Optics letters

دوره 27 4  شماره 

صفحات  -

تاریخ انتشار 2002