In:
Applied Optics, Optica Publishing Group, Vol. 62, No. 14 ( 2023-05-10), p. 3772-
Abstract:
Integrated narrow-linewidth lasers are the key devices in compact coherent optical
systems of metrology, sensing, and optical microwave generation. Here, we demonstrate a hybrid integrated laser based on an optical negative
feedback scheme. The laser is composed of a commercial distributed feedback (DFB) laser diode and an on-chip micro-resonator with a
Q-factor of 0.815 million. The feedback optical field is coupled back to the laser cavity through the back facet. Therefore, the laser can
maintain the lasing efficiency of the DFB laser diode. The linewidth of the DFB laser diode is compressed from 2 MHz to
6 kHz, corresponding to the linewidth reduction factor of 25.2 dB. The theoretical result shows that the laser
performance still has a huge improvement margin through precise control of the detuning between laser frequency and
the micro-resonator, as well as the phase delay of the feedback optical field. The hybrid narrow-linewidth laser diode has wide
application prospects in coherent optical systems benefitting from the low cost and volume productivity.
Type of Medium:
Online Resource
ISSN:
1559-128X
,
2155-3165
Language:
English
Publisher:
Optica Publishing Group
Publication Date:
2023
detail.hit.zdb_id:
207387-0
