FLM Series
Fixed-wavelength narrow-linewidth semiconductor laser module containing the optical system only, for integration behind a customer-supplied power supply and driver. Emission wavelength is specified at order.
Technical overview
The FLM is the OEM version of Koshin Kogaku's fixed-wavelength laser source: the housing carries the optical system alone, so the integrator supplies the power supply and driver. Wavelength is set to order within 1180-1370 nm or 1400-1680 nm to +/-0.2 nm, with typical linewidth of 30 kHz (minimum 10 kHz), typical RIN of -150 dB/Hz and output of +10 dBm or more on polarization-maintaining fiber. Its 50 x 75 x 29 footprint is well under the driver-included FLS. The manufacturer notes that a highly stable power supply and driver are required to reach the quoted linewidth and RIN.
Features
- Emission wavelength specified by the customer within 1180-1370 nm or 1400-1680 nm
- Emission wavelength can be retuned after purchase
- Optical system only - power supply and driver are external
- Compact 50 x 75 x 29 housing
- Narrow spectrum linewidth and low RIN
- Optical connector selectable on the polarization-maintaining output fiber
- Suitable for embedding in equipment; multi-wavelength customization available
Specifications
| Parameter | Value |
|---|---|
| Model designation | FLM-**** (specified wavelength) |
| Setting wavelength | 1180-1370 / 1400-1680 (specify the required wavelength) nm |
| Wavelength accuracy | ≤±0.2 nm |
| Optical output power | ≥+10 dBm |
| Spectrum linewidth, typical | ≤30 (Min.: ≤10); requires a highly stable power supply and driver kHz |
| RIN, typical | ≤-150; requires a highly stable power supply and driver dB/Hz |
| Frequency stability | ≤±100 MHz (60 min.) = ±0.8 pm wavelength stability, in a constant environment MHz |
| Optical output power stability | ≤±0.03 (60 min., constant environment) dB |
| Output optical fiber | Polarization maintaining fiber; optical connectors selectable |
| Polarization | Linear polarization, aligned to the connector key; extinction ratio ≥20 dB (typical) |
| Dimensions (W x D x H) | 50 x 75 x 29 (unit not stated by the manufacturer; assumed mm but NOT confirmed) |
Applications
- OEM fixed-wavelength light source embedded in test and inspection equipment
- Multi-wavelength inspection equipment (customization)
- Light source for investigation and laboratory work
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