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TEC-420 Amplified Littman/Metcalf Series
US Patent 5,867,512 | US Patent 6,297,066 | US Patent 6,869,483 | US Patents pendingDescription:
The TEC-420 Amplified Littman Laser System consists of a TEC-500 Littman/Metcalf master laser amplified by a TEC-400 tapered amplifier stage up to 500 .. 2500mW. It takes advantage of the beam-walk free wavelength tuning of the Littman/Metcalf design which is required for a stable amplification stage.
Wavelength
- from 670nm to 1120nm
High optical power
- output power up to 2500mW
- excellent quantum efficiency
- high fiber coupling efficiency
Excellent tuning behavior
- use of in-house anti-reflection coated laser diode
- fine tuning via piezo actuator with a resolution better than 10MHz
- manual coarse tuning up to 30nm at 780nm or 830nm
- large mode-hop free tuning range of up to 100GHz and more
Narrow linewidth
- linewidth < 300kHz
- excellent side mode suppression > 50dB
Excellent frequency locking performance
- high resonance free piezo modulation
- high frequency laser current modulation
- excellent temperature stability
- low acoustic susceptibility
- excellent locking stability
High flexibility
- free beam and fiber coupled versions available
- motorized master Littman / Metcalf laser with automated wavelength scans via remote software
- constant current and constant power operation modes (optional)
- excellent laser performance and frequency stability)
Plug & Play configuration
- modular laser system design
- automated piezo tuning with power read-out
- remote control via GPIB, RS232 and USB
Application
- Spectroscopy and optical process control
- Seed laser for THz generation
- Optical cooling and trapping, BEC
- Absolute distance interferometry
- Laser and OPO seeding
- Non-linear optical processes
TEC-420 Amplified Littman/Metcalf Series
The TEC-420 Amplified Littman System is an easy to use diode laser system with a Littman/Metcalf master laser and a Tapered amplifier stage. The emitted light is decoupled via a 60dB isolator (not shown in the schematic drawing) before entering the tapered amplifier. The tapered amplifier diode is both side antireflection coated. A two stage collimating optics gurantees an almost diffraction limited beam quality characterized by a M² < 1.7 .
Benefit of AR-Coated diode lasers, System Performance:
The quality of our anti-reflection coatings guarantees the performance of the Littman / Metcalf master laser as well as the quality of the tapered amplifier diode.
Below is a simplified drawing of the configuration
Single-mode fiber coupling option
Due to the excellent mechanical stability of our Littrow laser system, we are able to perform high efficiency fiber coupling with coupling efficiencies between 40% and 70% into single mode polarization maintaining optical fibers.
Motorized Littman Master Amplifier System
Sacher Lasertechnik has realized a motorized Master Littman laser which provides automated scans via remote control software.
Wavelength scan
|
Model |
Wavelength |
Power |
Tuning Total |
Tuning Mode-hop Free |
Application | |
| TEC-420-0670-0500 | 662-678nm | 500mW | 8nm | 30GHz |
Lithium |
 |
|
TEC-420-0735-0500 |
730-740nm | 500mW | 15nm | 30GHz |
|
|
|
TEC-420-0770-1500 |
752-772nm | 1500mW | 15nm | 60GHz |
Oxigen |
|
| TEC-420-0780-1000 | 770-785nm | 1000mW | 15nm | 60GHz | Rubidium |
|
| TEC-420-0780-2500 | 770-789nm | 2500mW | 15nm | 60GHz | Rubidium |
|
|
TEC-420-0795-1500 |
790-810nm | 500mW | 15nm | 30GHz |
Rubidium SHG |
|
|
TEC-420-0830-1000 |
820-840nm | 500mW | 20nm | 60GHz |
Xenon SHG |
|
| TEC-420-0850-1000 | 840-852nm | 1000mW | 20nm | 60GHz |
Caesium SHG |
|
|
TEC-420-0915-1500 |
890-940nm | 1500mW | 30nm | 60GHz |
Caesium SHG |
|
|
TEC-420-0960-1500 |
950-985nm | 1500mW | 30nm | 60GHz |
Water BTX, SHG |
|
| TEC-420-1020-0500 | 980-1040nm | 500mW | 40nm | 60GHz | SHG | |
| TEC-420-1060-0500 | 1040-1080nm | 500mW | 40nm | 60GHz |
SHG, YAG Seeding |
|
| TEC-420-1060-1500 | 1040-1080nm | 1500mW | 40nm | 60GHz |
SHG, YAG Seeding |
|
| TEC-420-1080-0500 | 1070-1120nm | 500mW | 30nm | 30GHz | Helium |
General Specifications:
| Output Power | 500mW .. 3000mW |
| Wavelength | 735nm .. 1120nm |
| Linewidth (50ms) | < 0.5MHz, typ. 0.3MHz |
| Linewidth (20s) | < 5MHz, typ. 2MHz |
| Long Term Drift (24h) | typical 300MHz |
| Side mode suppression | > 40dB, typical 45 dB |
| Beam Waist (2w) | 2.5 x 2.5mm .. 3.0 x 1.5mm |
| Beam Divergence | < 2mrad |
| Beam Quality M² | M² < 1.7 |
| Coarse Tuning Range | 10nm .. 40nm |
| Fine Tuning (total / mode-hop-free) | 250GHz / 30GHz .. 100GHz |
| Polarization | Linearly > 100:1 |
| Laser Head Dimensions | 210 x 100 x 307mm |
