What type of laser is this?

This is an external cavity semiconductor (ECL) laser, which offers a cost-effective alternative to fiber DFB lasers with slightly wider linewidth (≤200 kHz vs ≤3 kHz).

What linewidth options are available?

Two linewidth grades are available: ≤150 kHz and ≤200 kHz.

How does this compare to the fiber DFB version?

The ECL semiconductor version offers wider linewidth (200 kHz vs 3 kHz) and lower output power (up to 100 mW vs 1000 mW), but at a significantly lower price point. It is suitable for applications that do not require ultra-narrow linewidth.

1550nm Narrow Linewidth Semiconductor

Name: 1550nm Narrow Linewidth Semiconductor Laser
Brand: Laser Instrument Store
SKU: NLSL-1550-150k-20-SM-B · 1550 nm
Availability: InStock

This 1550 nm single-frequency narrow-linewidth laser is based on an ultra-narrow-linewidth external cavity semiconductor (ECL) chip, delivering single-longitudinal-mode CW output with spectral linewidth of 150~200 kHz and side mode suppression ratio ≥50 dB. Available with output power of 20, 50, or 100 mW in both SM (SMF-28) and PM (PM1550) fiber options, with module (M15/M20) and benchtop (B1) package forms. Ideal for distributed fiber sensing, LiDAR, quantum optics, and precision spectroscopy.

Configuration	Laser Type	Wavelength & Tolerance	Spectral Linewidth	Output Power	Output Fiber	Package Form	Price	Action	Availability
NLSL-1550-150k-20-SM-M	ECL Semiconductor	1550±1nm	≤200kHz	20 mW	G652D(SMF-28)	M15 module	$2,686.57		Available

1550nm Narrow Linewidth Semiconductor Laser

Critical Performance Parameters

What type of laser is this?

What linewidth options are available?

How does this compare to the fiber DFB version?