TY - JOUR
T1 - Experimental demonstration of linewidth reduction of laser diode by compact coherent optical negative feedback system
AU - Aoyama, Konosuke
AU - Yoshioka, Ryuichi
AU - Yokota, Nobuhide
AU - Kobayashi, Wataru
AU - Yasaka, Hiroshi
N1 - Publisher Copyright:
© 2014 The Japan Society of Applied Physics
PY - 2014/12/1
Y1 - 2014/12/1
N2 - We demonstrate the linewidth reduction of a laser diode from 6.4MHz to 6.5 kHz using a compact coherent optical negative feedback system, which consists of only a lens and an optical filter. The FM noise power spectral density (PSD) and the relative intensity noise (RIN) of the laser output are measured to discuss the performance of the system. The FM noise PSD is reduced by ∼30 dB at <100 MHz. The RIN of ∼130 dB/Hz is not found to be increased by the feedback at <7 GHz, where the system is driven under negative feedback conditions.
AB - We demonstrate the linewidth reduction of a laser diode from 6.4MHz to 6.5 kHz using a compact coherent optical negative feedback system, which consists of only a lens and an optical filter. The FM noise power spectral density (PSD) and the relative intensity noise (RIN) of the laser output are measured to discuss the performance of the system. The FM noise PSD is reduced by ∼30 dB at <100 MHz. The RIN of ∼130 dB/Hz is not found to be increased by the feedback at <7 GHz, where the system is driven under negative feedback conditions.
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U2 - 10.7567/APEX.7.122701
DO - 10.7567/APEX.7.122701
M3 - Article
AN - SCOPUS:84916613178
SN - 1882-0778
VL - 7
SP - 122701
JO - Applied Physics Express
JF - Applied Physics Express
IS - 12
ER -