Faraday Optical Isolators & Rotators
• Available wavelength range: 400 nm to 1250 nm
• Peak isolation: >38 dB; >60 dB
• Transmission: >92% in HT modification
• Broadband and tunable models
• Thin-film polarizer modifications having higher laser-induced damage threshold of 5 J/cm^2 at 10 ns
Application:
• Seed Oscillator for Ultrafast Amplifiers
• Ultrafast Oscillator and Amplifier Pulse Selection
• Injection/Ejection of Pulses in Ultrafast Amplifier Systems
• OEM Integration
• Novel Ultrafast Fiber Laser Development
• Optical Feedback Elimination • Amplifier Design
Product overview
A Faraday isolator (FI) is a nonreciprocal optical device which transmits the linearly polarized light in one direction and deflects the backward beam. It usually consists of a Faraday rotator and two polarizers. The Faraday rotator is made of magneto-optical active material which is placed into the permanent magnet system (Nd-Fe-B).
Two types of the magneto-optical active materials are available: Terbium-doped glass, Terbium-Gallium-Garnet (TGG) crystals.
The isolator protects a laser source by attenuating the reflected and backscattered light by several orders of magnitude (10^4 to 10^6). It is also used when some devices have extreme sensitivity to optical feedback which can cause intensity instabilities, frequency pulling and other undesirable effects. A Faraday isolator is also indispensable in CPA (chirped-pulse amplificaiton) laser layouts, where seed oscillator and its pump may get damaged easily by occasional back reflections.
Our company offers a variety of optical isolator models:
• Highly transparent single-stage isolators. Isolation 38-44 dB, wavelength from 400 to 1250 nm (fixed), clear aperture 2-15 mm. Transmission >90%.
• Broadband isolators. Isolation >38 dB. Center wavelength - 800 nm (other designs are also available on request). Bandwidth - 120 nm (>30 dB). Clear aperture is 2-12 mm. HT and SE modifications are also available.
• Tunable isolators. Peak isolation 38-42 dB. Central wavelength - 780 nm. Tuning range from 710 to 880 nm. Other wavelengths available upon request. Simple and convenient operation.
• Single stage isolators with side exit (SE). Isolation 38-44 dB, wavelength from 400 to 1250 nm (fixed), bandwidth - 30 nm. Clear aperture 2-12 mm.
• Double-stage isolators. Isolation >60 dB. Wavelength is 600 - 1150 nm (fixed). Bandwidth - 30 nm. Clear aperture 2 - 12 mm.
Central wavelength, nm
Clear aperture,
mm1)
Part number
Rod material
Peak Isolation,
dB2)
Bandwidth (at >30 dB), nm
Tpeak, %
LxWxH (beam height), mm
1250
5
5AFR-1250C
TGG
38
±5
98
65x71x77 (42)
5AFI-1250C
90
90x71x77 (42)
1030-1070,
fixed
2
2AFR-1064C
TGG
38
±10
98
50x38x46 (26)
2AFI-1064C
90
78x38x46 (26)
4
4AFR-1064C
38
±10
98
52x45x51 (28.5)
4AFI-1064C
90
85x45x51 (28.5)
6
6AFR-1064C
38
±10
98
55x48x54 (30)
6AFI-1064C
90
92x48x54 (30)
8
8AFR-1064C
38
±10
98
62x59x65 (35.5)
8AFI-1064C
90
100x59x65 (35.5)
10
10AFR-1064C
38
±10
98
65x66x72 (39)
10AFI-1064C
90
110x66x72 (39)
12
12AFR-1064C
38
±10
98
69x71x77 (41.5)
12AFI-1064C
90
120x71x77 (41.5)
1030, broadband
2-12
(2-12)AFRB-1030C
TGG
35
980-1070
98
W, H same as fixed, L+8 mm
(2-12)AFIB-1030C
88
700-900,
fixed
2
2AFR-800C, G
TGG (C) or Glass (G)
38
±10
98
50x38x46 (26)
2AFI-800C, G
90
78x38x46 (26)
4
4AFR-800C, G
38
±10
98
52x45x51 (28.5)
4AFI-800C, G
90
85x45x51 (28.5)
5
5AFR-800C, G
38
±10
98
52x48x54 (30)
5AFI-800C, G
90
88x48x54 (30)
8
8AFR-800C, G
38
±10
98
62x59x65 (35.5)
8AFI-800C, G
90
100x59x65 (35.5)
10
10AFR-800C, G
38
±10
98
65x66x72 (39)
10AFI-800C, G
90
110x66x72 (39)
12
12AFR-800C, G
38
±10
98
69x71x77 (41.5)
12AFI-800C, G
90
120x71x77 (41.5)
15
15AFR-800C, G
38
±10
98
71x81x84 (46)
15AFI-800C, G
90
140x81x84 (46)
700-880,
broadband
4-12
(4-12)AFRB-800C, G
TGG (C) or Glass (G)
35
±60
98
W, H same as fixed, L+6 mm
(4-12)AFIB-800C, G
88
710-880, tunable
4-12
(4-12)AFIТ-800C, G
TGG (C) or Glass (G)
38
±10
88
W, H same as fixed, L+50 mm
633
4
4AFR-633С
TGG
38
±10
98
52x45x51 (28.5)
4AFI-633С
85
85x45x51 (28.5)
5
5AFR-633G
Glass
38
±10
98
52x48x54 (30)
5AFI-633G
85
90x48x54 (30)
532
2
2AFR-532С
TGG
38
±10
97
30x38x46 (26)
2AFI-532С
85
75x38x46 (26)
5
5AFR-532С
38
±10
97
30x48x54 (30)
5AFI-532С
85
90x48x54 (30)
8
8AFR-532С
38
±10
97
42x59x65 (35.5)
8AFI-532С
85
100x59x65 (35.5)
10
10AFR-532С
38
±10
97
45x66x72 (39)
10AFI-532С
85
110x66x72 (39)
400
4
4AFR-400С
TGG
38
±5
85
30x45x51 (28.5)
4AFI-400С
75
60x45x51 (28.5)
6
6AFR-400С
38
±5
85
30x48x54 (30)
6AFI-400С
75
70x48x54 (30)
Polarization-independent isolators:
1064
1.53)
PI35C4)
TGG
35
±5
90
120x48x52 (28)
1064
1.53)
PI35C35)
TGG
35
±5
90
80x32x32
1) typical apertures, other apertures are available upon request;
2) >60 dB double-stage optical isolators are available upon request;
3) input beam diameter at 1/e^2;
4) the PI35CF model with fiber-input is available;
5) small package.
- AFR in part number means Faraday rotator (supplied without polarizers), AFI means Faraday isolator (supplied with polarizers), PI means polarization-independent isolator (with polarizers);
- Damage threshold (typical): AFI isolators: 1 J/cm^2 at 10 ns; AFR rotators: 5 J/cm^2 at 10 ns; some isolator models are available in TFP version and 5 J/cm^2 at 10 ns DT, please enquire;
- Optical power: TGG rods have higher average power threshold than Glass rods (we recommend using TGG for beams with average power roughly >10 W/cm^2);
- Isolation ratio in case of a rotator shows achievable isolation ratio with the use of properly chosen external polarizers.
商品属性 [波长] 400 nm to 1250 nm