Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Isolator-free Integration of C-band InAs-InP Quantum Dash Buried
  Heterostructure Lasers with Silicon Waveguides   An InAs-on-InP quantum dash buried heterostructure laser and silicon chip
optimized for mutual integration by direct facet-to-facet coupling have
achieved -1.2 dB coupling efficiency, with coupled laser RIN of -150 dB/Hz and
152 kHz linewidth.

35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
25
The categories of this paper are: patt-sol