#linewidth

[ushf]

GNU screen and irssi line-length, width and wrapping

On Centos-6.4 there seems to be a problem with honoring the wrapping of lines in irssi within screen.

Normally one can just pass a "Ctrl-r" to irssi with  "C-a r" which will toggle irssi's wrap on/off (reported at top of terminal with +wrap or -wrap).

or C-a F will make GNU screen fit the current contents within the window.

[laserzap-blog]

Schawlow - Townes Linewidth

The fundamental linewidth of a laser, which only acquires quantum noise, was already predicted by Schawlow and Townes even before the laser was experimentally demonstrated. The famous Schawlow-Townes equation is as follows: \[ \Delta \nu_{laser} = \dfrac{ \pi h \nu (\Delta \nu_c )^2 }{ P_{out}} \] with the photon energy \( h \nu \), the resonator bandwidth \( \Delta \nu_c \) (full width at half-maximum, FWHM), and the output power \( P_{out} \). Reference: RP Photonics