Table 1. Comparison of visible fiber CR sources and the visible band of a typical fiber SC source.

Visible signal [reference]	CR      [11]	CR-Laser-Quantum [11]	CR-Calmar [12]	“CR”  [13]	CR-  High-Q [13]	SC-Visible [4]
Pump laser  (vendor)	Ti:Sa (home-built)	Ti:Sa (Taccor s, Laser Quantum)	Er:fiber (Mendo-cino, Calmar)	solid-state Yb (Mikan, Amplitude System)	Yb:KYW (Femto-Train, High-Q)	unknown all-fiber laser
Pump wavelength λ	830 nm	800 nm	1550 nm	1030 nm	1040 nm	1060 nm
FWHM pulse-width of pump	~10 fs (dechirped)	~15 fs (chirped)	80 fs	~250 fs	229 fs	~10 ps
Repetition rate f	1 GHz	1.000 GHz	50.2 MHz	54.77 MHz	80.2 MHz	25.1 MHz
Photonic crystal fiber (NKT Photonics)	NL-PM-750	NL-2.0-745-02	LMA-8	NL-3.7-975	NL-3.7-975	unknown
Fiber core diameter	1.8 µm	2.0 µm	8 µm	3.7 µm	3.7 µm	~5 µm
zero-dispersion wavelength	750 nm	745 nm	1157 nm	975 nm	975 nm	~1040 nm
Fiber length	10 cm	9 cm	9 cm	8.5 cm	9 cm	>2 m
β2 at pump λ (fs2/cm)	164	143	486	51	75	unknown
γ at pump λ (Wkm)−1	95	104	2.1	18	18	unknown
λ/2 plate controlling input polarization	used	used	not used	not used	used	not used
Free-space-to-fiber coupling efficiency	24%	47%	78%	no data	71%	all-fiber system
Fiber output power	190 mW	221 mW	1170 mW	650 mW	830 mW	5000 mW
Soliton order N	5.8	8.5	4.9	179	131	>500
Signal treatment		filtered			shaped	shaped
Signal central λ	540 nm	625 nm	620 nm	670 nm	638 nm	623 nm
Signal FWHM bandwidth	60 nm	45 nm	43 nm	90 nm	44 nm	45 nm
Signal average  power	~50 mW	40 mW	85 mW	250 mW  (<860 nm)	25 mW	N.A.
Signal averaged RIN (up to f/2)	no test	<-149.5 dB/Hz	−142.1 dB/Hz	no test	−123.9 dB/Hz	−112.3 dB/Hz
Signal pulse compressibility	no test	yes	yes	no test	no	no
Signal polarization ratio (typical)	no data	20:1	50:1	no data	5:1	random
Pump-CR conversion	20-30%	18%	7%	40%		N.A.
Long-term stability	no data	>30 hr	>300 hr	no data	no test	>100 hr