Ws. Man et al., Frequency instability in Er/Yb fiber grating lasers due to heating by nonradiative transitions, IEEE PHOTON, 11(11), 1999, pp. 1390-1392
Heating of the Er/Yb-codoped fiber lasers due to strong pump absorption was
found to cause large frequency fluctuation in addition to lasing wavelengt
h shift. Laser frequency fluctuation of up to 1.7 GHz was measured by using
an absorption line of an acetylene gas cell. The large frequency fluctuati
on was reduced to less than 80 MHz with proper cooling of the laser.