Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A fiber-integrated single photon source emitting at telecom wavelengths   Fiber-coupled single photon sources are essential components of
photonics-based quantum information processors. Most fiber-coupled single
photon sources require careful alignment between fibers and quantum emitters.
In this work, we present an alignment-free fiber-integrated single photon
source based on an InAs/InP quantum dot emitting at telecom wavelengths. We
designed a nanobeam containing the quantum dots attached to a fiber taper. The
adiabatic tapered coupler of the nanobeam enables efficient light coupling to
the fiber taper. Using a tungsten probe in a focused ion beam system, we
transferred the nanobeam to the fiber taper. The observed fiber-coupled single
photon emission occurs with a brightness of 1.5% and purity of 86%. This device
provides a building block for fiber-optic quantum circuits that have various
applications, such as quantum communication and distributed quantum computing.

21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat