The 1.0um wavelength region high-power circulators are built using TGG magneto-optic crystal and NdFeB magnets. The circulator routes incoming signal from Port-1 to Port-2, and returned (or incoming) signal from Port-2 to Port-3.They have the advantages of high peak laser damage threshold, low insertion loss, high isolation (32dB), high polarization extinction ratio (>23dB). They are best used for dispersion compensation in ultrafast fiber lasers and CPAs. The distinguished high quality is attributed to a combination of our years of experience, advanced design technology aided with computer modeling, and sophisticated manufacturing technology.
They are targeted for applications up to 50W input power. They provide the ultimate protection for Yb- or Er-doped fiber lasers and amplifiers.
We offer various input and output fiber options, such as standard single-mode fiber, PM fiber or large mode area (LMA) fibers with either in single-clad (SC) type or in double-clad (DC) type.
Mode matching functionalities or the so-called mode-field adaptions (MFA) and suppression functionality for amplified spontaneous emission (ASE) can be integrated in the isolator.
In mm
Features
- >30 dB peak isolation for single stage core, >60dB for dual-stage core
- Up to 50W input power
- Mode field adaption functionality integration
- Up to 30dB suppression on back- reflected broadband ASE
- Compact footprint
Applications
- CPA fiber amplifiers
- Laser pulse stretching and compressing
- Dispersion compensation together with FBGs
| Product Type | Circulator | Circulator with build-in BPFs | Circulator with build-in MFA | Circulator with build in BPFs & MFA |
|---|---|---|---|---|
| Operating Wavelength (nm) | 1064, 1030, or specified wavelength and passband | |||
| Passband (nm) | +/- 20 | +/- 2, +/- 4 or specify | +/- 20 | +/- 2, +/- 4 or specify |
| Peak Isolation (dB) | 28 | |||
| Min. In-band Isolation (dB) | >25 | |||
| Typical Insertion Loss (dB, @0.5W) | 1.3 | 1.5 | 1.3 | 1.5 |
| Max. In-band Insertion Loss (dB, @ 0.5W) | 1.5 | 1.8 | 1.5 | 1.8 |
| Min. Extinction Ratio (dB, for PM) | 20 | |||
| Min. Return Loss (dB, Input/Output) | 50 | |||
| Min. Blocking for Back-Reflected ASE (%) a | 95 | 95 | ||
| Max. M2 | 1.2 (PL1060L, PLMA10, 15, 20), 1.3 (PLMA 25) | |||
| Fiber Type b | PM980; PM1060L, PLMA10um, PLMA15um, PLMA20um, and PLMA 25um, or specify | |||
| Max Peak Power Handling (kW, cw) | 10 | |||
| Max Power Handling (W, ns pulse) | 10, 20, 30 | |||
| Dimensions (mm) c | 60*31.5*28 | |||
| a. For passband +/- 2nm | ||||
| b. M2 is specified for PM98 fiber as input, PLMA fibers with nominal core diamter 10, 15, 20, or 25um output fiber. | ||||
| c. Dimension is for single stage isolators | ||||