https://doi.org/10.15407/spqeo6.03.365
Semiconductor Physics, Quantum Electronics & Optoelectronics. 2003. V. 6, N 3. P. 365-369.
PACS: 42.60.Lh
Destabilizing factors in
operation of short-cavity He-Ne laser
G.L. Kononchuk, V.V. Stukalenko
Physics Department, Kyiv National Taras
Shevchenko University, 6 Akademician Glushkov prospect, 03127 Kyiv, Ukraine
E-mail: stvik@ukr.net
Abstract. The influence of longitudinal manetic field (MF) on a position of polarization
planes (PPs) of the main modes (l
= 0.63 mm)
in dependency on the generation frequency and off-axis mode presence was
investigated in this work. It was shown that mode PPs are strictly orthogonal
only in their symmetrical position in the amplification contour. In other
spectral ranges PP position depends on the value of cavity anisotropy
and local MF. Local MF action is equivalent to that of homogeneous MF.
Characteristics of axis modes (intensity, PP position, optical frequency
and especially an inter-mode beating frequency) are destabilized by modes
of higher orders, dynamics of which possesses a random character. Nonlinear
interaction between modes and a strong dependency of their characteristics
on a local MF make stabilization system reliable operation impossible,
if these systems are based only on internal properties of laser emission.
The high sensitivity of the polarization state to the local MF can be
used for broad-band polarizational modulation of laser emission.
Keywords:
gas laser, stabilization, local magnetic field, polarization plane, mode
nonortho-gonality, intermode beating.
Paper received 09.06.03; revised manuscript
received 13.06.03; accepted for publication 16.06.03.
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