Table 1 Comparison of photon-pair sources produced in a single waveguide with a telecom cw pump

From: Efficient photon-pair generation in layer-poled lithium niobate nanophotonic waveguides

Platform

L

P

Brightness

Normalized brightness

CAR

\({g}_{{\rm{H}}}^{(2)}\)(0)

 

(mm)

(mW)

(Hz nm−1)

(Hz nm−1 mW−2)

  

Si55

11.3

5

2.0 × 106

7.8 × 104

4

-

Si56

8

11.2

7.1 × 106

5.7 × 104

251

0.014

Si57

10

1

1.9 × 105

1.9 × 105

~400

<0.12

SiN58

10

5.0

4.8 × 105

1.9 × 104

3

-

As2S318

71

57

2.5 × 106

7.5 × 102

< 2

-

AlGaAs59

3

0.354

1.1 × 103

8.8 × 103

21

-

This work

3.3

0.5

7.7 × 105

3.1 × 106

663

0.008

  1. Main factors include device length (L), pump power (P), brightness, normalized brightness, as well as coincidence-to-accidental ratio (CAR) and heralded second-order correlation (\({g}_{{\rm{H}}}^{(2)}(0)\)) at the corresponding brightness
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